Go: package main

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

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
                if x == 0.0 {
                        x = math.Abs(x)
                }
                if y == 0.0 {
                        y = math.Abs(y)
                }
                fmt.Printf("%.3f %.3f\n", x, y)
        }
}

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

int main(){
        int a,b,c,d,e,f;
        while(std::cin >> a >> b >> c >> d >> e >> f){
                double x, y;
                int p,q;
                p = a * e - d * b;
                q = c * e - f * b;
                x = q / p;
                if(int(x * 10000) % 10 >4) x += 0.001;
                p = b * d - e * a;
                q = c * d - f * a;
                y = q / p;
                if(int(y * 10000) % 10 >4) y += 0.001;
                std::cout << std::fixed << std::setprecision(3) << x << " " << y << std::endl;
        }
        return 0;
}

C++: #include <cstdio>
int main() {
 double a,b,c,d,e,f;
 while(scanf("%lf %lf %lf %lf %lf %lf",&a,&b,&c,&d,&e,&f)!=EOF){
  printf("%.3f %.3f\n",(c*e-b*f)/(a*e-b*d),(a*f-d*c)/(a*e-b*d));
 };
 return 0;
};

C++: #include <iostream>
#include <iomanip>
#include <cstdlib>
using namespace std;


int main(void){

  int a;
  int b;
  int c;
  int d;
  int e;
  int f;

  float x;
  float y;

  cin >> a >> b >> c >> d >> e >> f;

  x = a * e - b * d ;
  y = b * d - a * e ;

  if ((x == 0) && (y == 0)){
    cerr << "x?????????y??????????????????" << endl;
    exit(1);
  }else if(x == 0){
    cerr << "x??????????????????" << endl;
    exit(1);
  }else if(y == 0){
    cerr << "y??????????????????" << endl;
    exit(1);
  }else{

    if(c * e - b * f == 0){
      x = 0;
    }else{
      x = ( c * e - b * f ) / x ;
    }

    if(c * d - a * f == 0){
      y = 0;
    }else{
      y = ( c * d - a * f) / y;
    }

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

  return 0;


}

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

using namespace std;

int main(void)
{
    int a,b,c,d,e,f;
    double x,y;
    
    cout << fixed << setprecision(3);
    while (cin >> a >> b >> c >> d >> e >> f) {
        if (a == 0) {
            y = (double)c / (double)b;
            x = ((double)f - (double)e * y) / (double)d;
        } else {
            y = (double)(a * f - c * d) / (double)(a * e - b * d);
            x = ((double)c - (double)b * y) / (double)a;
        }
        cout << x << " " << y << endl;
    }
    
    return 0;
}

C++: #include <cstdio>

int main(){
    int a,b,c,d,e,f;
    while(scanf("%d %d %d %d %d %d", &a,&b,&c,&d,&e,&f)+1){
        double x = (c*e-b*f)/(a*e-b*d);
        double y = (c*d-a*f)/(b*d-a*e);
        printf("%.3lf %.3lf\n", x, y);
    }
    return 0;
}

C++: #include <iostream>

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

    while (std::cin >> a >> b >> c >> d >> e >> f) {
        double x = (c*e - b*f)/(a*e - b*d);
        double y = (c*d - a*f)/(b*d - a*e);
        printf ("%.3f %.3f\n",
                x == -0 ? 0 : x,
                y == -0 ? 0 : y);
    }

    return 0;
}

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);
 }
}