Go: package main

import (
        "fmt"
        "bufio"
        "os"
)

func main() {
        var a, b, c, d, e, f float64
        sc := bufio.NewScanner(os.Stdin)
        for sc.Scan() {
                fmt.Sscanf(sc.Text(), "%f %f %f %f %f %f", &a, &b, &c, &d, &e, &f)

                det := a*e - b*d
                x := (e*c - b*f) / det
                y := (a*f - c*d) / det
                fmt.Printf("%.3f %.3f\n", x, y)
        }
}

C++: #include<iostream>
#include<iomanip>
#include<vector>
#include<map>
#include<string>
using namespace std;
/*
??£???????¨????
	ax + by = c
	dx + ey = f
????§£x, y???????????????????????°??????
*/
int main() {
	int a, b, c, d, e, f;
	int cnt = 0;						//??\??????????????£???????¨????????????°
	std::vector<double> x_vector;		//x????§£???????´?
	std::vector<double> y_vector;		//y????§£???????´?

#if 0
	while (cnt < 2) {
		cin >> a >> b >> c >> d >> e >> f;
#else
	while (cin >> a >> b >> c >> d >> e >> f) {
#endif
		double x = (b * f - c * e) / (b * d - a * e);
		double y = (c * d - a * f) / (b * d - a * e);

		cnt++;
		x_vector.push_back(x);
		y_vector.push_back(y);
	}

	for (unsigned int i = 0; i < cnt; i++) {
		std::cout << std::fixed;
		std::cout << std::setprecision(3) << x_vector[i] << " ";
		std::cout << std::setprecision(3) << y_vector[i] << endl;
	}

	//???????????°
	while (1);

	return 0;
}

C++: #include<iostream>
#include<cstdio>
#include<iomanip>
#include<vector>
using namespace std;
class SimultaneousEquation{ 
    public:
        void solve(int a,int b,int c,int d,int e,int f){ 
            double x,y;
            x=double(c*e-b*f)/(a*e-b*d);
            y=double(c*d-a*f)/(b*d-a*e);
            printf("%.3lf %.3lf\n",x,y);
            }
};
int main(){ 
    int a,b,c,d,e,f;
    SimultaneousEquation inst;
    while(cin>>a>>b>>c>>d>>e>>f){
        inst.solve(a,b,c,d,e,f);
    }
}

C++: #include <iostream>
#include <algorithm>
#include <cstdio>
#include <cmath>
using namespace std;
const double eps = 1e-4;

bool equals(double a, double b) {
  return abs(a-b) < eps;
}

int main() {
  int a, b, c, d, e, f;
  while(cin >> a >> b >> c >> d >> e >> f) {
    double y = (d*c-a*f)/(double)(d*b-a*e);
    double x = (f-e*y)/(double)d;
    if(equals(x,0.0)) x = 0;
    if(equals(y,0.0)) y = 0;
    printf("%.3f %.3f\n", x, y);
  }
  return 0;
}

C++: #include <iomanip>
#include <iostream>

using namespace std;

/* ax + by = c
   dx + ey = f
   
   (x, y) = { (ce - bf) / (ae - bd), (af - cd) / (ae - bd) } */


void Equation2(double a, double b, double c, double d, double e, double f, double& x, double& y)
{
	x = (c * e - b * f) / (a * e - b * d);
	y = (a * f - c * d) / (a * e - b * d);
}

int main()
{
	double a, b, c, d, e, f, x, y;

	while (cin >> a >> b >> c >> d >> e >> f)
	{
		Equation2(a, b, c, d, e, f, x, y);

		cout << fixed << setprecision(3) << x << ' ' << y << endl;
	}

	return 0;
}

C++: 
#include <iostream>
#include<string>
#include<cstdio>
#include<cmath>
#include<algorithm>
#include<vector>
#include<queue>
using namespace std;
int main(){
    double a,b,c,d,e,f,x,y;
    while(cin>>a>>b>>c>>d>>e>>f){
        x=(c*e-b*f)/(e*a-b*d);
        y=(c*d-a*f)/(b*d-a*e);
        if(x==0)x=0.000;
        if(y==0)y=0.000;
        printf("%.3f ",x);
        printf("%.3f\n",y);
    }
    return 0;
}

C++: #include<cstdio>
#include<iostream>
#include<algorithm>
#include<vector>
#include<set>
#include<string>
#include<functional>
#include<queue>
#include<math.h>
#define INF 999999

using namespace std;


int main()
{
	
	double a, b, c;
	double d, e, f;
	while (cin >> a >> b >> c >> d >> e >> f) {

		double x = (e*c - b*f) / (e*a - b*d);
		double y = (d*c - a*f) / (d*b - a*e);

		printf("%.3f %.3f\n", x, y);
	}

	return 0;
}

C++: #include <bits/stdc++.h>
#define rep(i,j,k) for(int i=(int)j;i<(int)k;i++)
#define itrep(i,x) for(auto i=(x).begin(); i!=(x).end();i++)
#define Sort(x) sort((x).begin(),(x).end())
#define all(x) (x).begin(),(x).end()
#define fi first
#define se second
#define vi vector<int>
#define INF (int)1e9
#define INFL 1e18
#define MOD 1000000007
#define pb push_back
#define MP make_pair
#define PI 3.1415926535
typedef long long int ll;
typedef std::pair<int,int> P;
int D=1;
int dx[4]={0,1,0,-1},dy[4]={-1,0,1,0};

using namespace std;

double se(double x){
    x*=10000.0;
    if((int)x%10>=5){
        x+=10.0;
    }
    x/=10000.0;
    
    return x;
}

int main(){
    double a,b,c,d,e,f;
    while(cin>>a>>b>>c>>d>>e>>f){
        printf("%.3f ",(c*e-f*b)/(a*e-b*d)+0.0);
        printf("%.3f\n",(a*f-c*d)/(a*e-b*d)+0.0);
    }
    
    return 0;
}

C++: #include<iostream>
#include<stdio.h>
using namespace std;
int main(){
double a,b,c,d,e,f;
double x,y;
while(cin >> a >> b >> c >> d >> e >> f){
  x = (double)((e*c-b*f) / (a*e-b*d));
  y = (double)((-(d*c)+a*f) / (a*e-b*d));
  if(x == 0){x = 0;}
  if(y == 0){y = 0;}
  printf("%.3f %.3f\n",x,y);
 }
}

C++: #include <iostream>
#include <iomanip>

int main(void) {
	int a, b, c, d, e, f, x, y;
	while (std::cin >> a >> b >> c >> d >> e >> f) {
		x = (double)((f*b - e*c) / (d*b - e*a));
		y = (double)((f*a - d*c) / (e*a - d*b));
		std::cout << std::fixed << std::setprecision(3)<< std::showpoint << x << ' ' << std::fixed << std::setprecision(3)<<std::showpoint << y << std::endl;
	}

	return 0;
}

C++: #include <iostream>
#include <iomanip>
using namespace std;
int main()
{
	float a,b,c,d,e,f,x,y;
	while(cin>>a>>b>>c>>d>>e>>f)
	{
		x=(c*e-b*f)/(a*e-b*d);
		y=(a*f-c*d)/(a*e-b*d);
		cout<<setiosflags(ios::fixed);
		cout<<setprecision(3)<<x<<" "<<setprecision(3)<<y<<endl;
	}
	return 0;
}

C++: #include <iostream>
#include <iomanip>
#include <math.h>
using namespace std;
int main(){
	double a, b, c, d, p, q;
	double x, y;
	while(cin >> a >> b >> p >> c >> d >> q){
		x = (d*p - b*q)/(a*d - b*c);
		y = (c*(-p) + a*q)/(a*d - b*c); //条件より?≠0
		x = floor(100*(x + 0.005)) / 100; 
		y = floor(100*(y + 0.005)) / 100; //四捨五入
		cout << setprecision(3) << fixed << x << " " << y << endl;
	}
	return(0);
}

C++: #include <iostream>
#include <iomanip>

using namespace std;

int main(void){
	double in;
	while(cin >> in){
		double a,b,c,d,p,q;
		double delta;
		double x,y;
		a = in;
		cin >> b;
		cin >> p;
		cin >> c;
		cin >> d;
		cin >> q;
		delta = a*d-b*c;
		x = (d*p-b*q)/delta;
		y = (-c*p+a*q)/delta;
		cout << showpoint << setprecision(4);//小数点以下4桁
		cout << (double)x << " " << (double)y << "\n";
	}
	return 0;
}

C++: #include <cstdio>
#include <cstdlib>
#include <cmath>
#include <climits>
#include <cfloat>
#include <map>
#include <utility>
#include <set>
#include <iostream>
#include <memory>
#include <string>
#include <vector>
#include <algorithm>
#include <functional>
#include <sstream>
#include <complex>
#include <stack>
#include <queue>
using namespace std;
typedef long long ll;
typedef vector<int> vint;
typedef pair<int, int> pint;
#define MOD 1000000007 //10^9+7
#define INF 1000000000 //10^9

pair<double, double>equ2(int a,int b,int c,int d,int e,int f){
    double det=1.0/(a*e-b*d);
    double x=(double)(c*e-b*f)*det;
    double y=(double)(a*f-c*d)*det;
    if (x==-0) x=0;if (y==-0) y=0;
    return pair<double, double>(x,y);
}

int main ()
{
    string str;
    while (!cin.eof()) {
        int a,b,c,d,e,f;
        
        cin>>a>>b>>c>>d>>e>>f;
        
        pair<double,double> ans=equ2(a,b,c,d,e,f);
        
        cout<<ans.first<<' '<<ans.second<<endl;
    }
}

C++: #include<cstdio>
#include<iostream>
#include<algorithm>
#include<vector>
#include<set>
#include<string>
#include<functional>
#include<queue>
#include<math.h>
#define INF 999999

using namespace std;


int main()
{
	
	double a, b, c;
	double d, e, f;

	vector<pair<double,double>> ans;
	while (cin >> a >> b >> c >> d >> e >> f) {

		double x = (e*c - b*f) / (e*a - b*d);
		double y = (d*c - a*f) / (d*b - a*e);
		if (x == 0)x = 0;
		if (y == 0)y = 0;
		ans.push_back(make_pair(x, y));

	}

	for (int i = 0; i < ans.size(); i++) {
		printf("%.3f %.3f\n", ans[i].first, ans[i].second);
	}

	return 0;
}