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("%04f %04f\n", x, y)
        }
}

C++: const int tt = 10000;

#include<iostream>
#include<string>
#include<sstream>
using namespace std;

string toStr(int n);
string intToString(int n);

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

    int det = a * e - b * d;

    int x = ( e * c - b * f) / det;
    int y = (-d * c + a * f) / det;
//    cout << x << y << endl;

    cout << toStr(x) << " " << toStr(y) << endl;
  }
}

string toStr(int n) {
  string pm, val;
  
  if (n < 0) {
    pm = "-";
    n = -n;
  } else {
    pm = "";
  }

  int ipart = n / tt;
  int fpart = (n - ipart * tt) + tt + 5;

  val = pm + intToString(ipart) + "." + intToString(fpart).substr(1, 3);
  return val;
}

string intToString(int n) {
  stringstream ss;
  ss << n;
  return ss.str();
}

C++: #include <bits/stdc++.h>
using namespace std;
typedef long long LL;
#define REP(i,N) for(int i = 0; i < (int)N; i++)

int main(){
	double hako[6];
	while(cin >> hako[0]){
		REP(i,5)cin >> hako[i+1];
		cout << (hako[2] - hako[5]*hako[1]/hako[4]) / (hako[0] - hako[3]*hako[1]/hako[4]);
		cout << " ";
		cout << (hako[2] - hako[5]*hako[0]/hako[3]) / (hako[1] - hako[4]*hako[0]/hako[3]);
		cout << endl;
	}
	return 0;
}

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

using namespace std;

int main(){

double x, y, a, b, c, d, e, f;

while(cin >> a >> b >> c >> d >> e >> f){

x = (double) (c*e-f*b)/(a*e-b*d);
y = (double) (c*d-a*f)/(b*d-a*e);
if(x==0) x = 0;
if(y==0) y = 0;

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

C++: #include <stdio.h>
#include <string>
#include <queue>
#include <stack>
#include <set>
#include <iostream>
#include <algorithm>
#include <vector>
#include <list>
#include <deque>
#include <math.h>
using namespace std;
int main()
{
    //freopen("input.txt","r",stdin);
    double a,b,c,d,e,f;
    while(cin>>a>>b>>c>>d>>e>>f)
    {
        double r1=b*f-e*c,r2=b*d-a*e;
        double x=r1/r2;

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

        printf("%.3lf %.3lf\n",x+0.0000001,y+0.0000001);
    }
    return 0;
}

C++: #include<stdio.h>
#include<math.h>
double sg(double x){
	if ( x > 0.0 ) {
		return floor(x + 0.0005);
	} else {
    	return -0.001 * floor(fabs(x) + 0.0005);
	}
}
int main(){
	double a,b,c,d,e,f,x,y;
	while(scanf("%lf%lf%lf%lf%lf%lf",&a,&b,&c,&d,&e,&f)!=EOF){
		y=(((c*d)-(a*f))/((b*d)-(a*e)));
		x=(((c*e)-(b*f))/((a*e)-(b*d)));
		printf("%f %f\n",x,y);
	}
	return 0;
}

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

C++: #include <iostream>
#include <vector>
#include <map>
#include <set>
#include <algorithm>
#include <queue>
#include <stack>
#include <cmath>
#include <cstdio>
#include <string>
#include <sstream>

using namespace std;

#define rep(i, n) for(int i = 0; i < (int)n; ++i)
#define repn(i, n) for(int i = 1; i <= (int)n; ++i)
#define pb push_back
#define lb lower_bound
#define mp make_pair
#define ite iterator
#define max2(x, y) ((x) > (y)) ? (x) : (y)
#define max3(x,y,z) max2((x), max2((y),(z)))
#define max4(v,w,x,y) max2(max2((v),(w)), max2((x),(y)))
#define min2(x, y) ((x) > (y)) ? (y) : (x)
#define min3(x,y,z) min2((x), min2((y),(z)))
#define min4(v,w,x,y) min2(min2((v),(w)), min2((x),(y)))
#define ul unsigned long
#define ull unsigned long long
#define INF 1000000007
#define MOD 1000000007
#define fs first
#define sd second

template<typename T>
bool elem(set<T> st, T val){
	return (st.find(val) != st.end());
}

template<typename T>
void printv(vector<T> vt){
    rep(i, vt.size() - 1)
        cout << vt[i] << " ";
    cout << vt[vt.size() - 1] << endl;
}

typedef vector<int> vint;
typedef vector<ul> vul;
typedef vector<ull> vull;
typedef pair<int, int> pii;


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

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

using namespace std;

int main(void){
	double arr[6];
	vector<double> x,y;

	while (cin >> arr[0] >> arr[1] >> arr[2] >> arr[3] >> arr[4] >> arr[5]){
		double a = arr[0]; double b = arr[1]; double c = arr[2]; double d = arr[3]; double e = arr[4]; double f = arr[5];
		x.push_back((c*e-b*f)/(a*e-b*d));
		y.push_back((c*d-a*f)/(b*d-a*e));
	}
	for (unsigned int i=0; i<x.size(); ++i){
		cout << x[i] << " " << y[i] << endl;
	}
	return 0;
}

C++: #include<iostream>
#include<stdio.h>
using namespace std;

int det(int a00, int a01, int a10, int a11)
{
	return a00*a11 - a01*a10;
}

int main()
{
	int a, b, c, d, e, f;
	while (cin >> a >> b >> c >> d >> e >> f)
	{
		int t = det(a, b, d, e);
		printf("%.3f %.3f", (double)det(c, b, f, e) / t, (double)det(a, c, d, f) / t);
	}
	return 0;
}

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

using namespace std;

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

C++: #include "iostream"
using namespace std;

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

    while(cin >> a >> b >> c >> d >> e >> f) {
        double num1 = a,num2 = d, x, y;
        a *= num2; b *= num2; c *= num2;
        d *= num1; e *= num1; f *= num1;

        num1 = b - e; num2 = c - f;
        y = num2 / num1; x = (c - b*y) / a;

        x *= 10000; y *= 10000;
        num = (int)x; x = (double)num;
        num = (int)y; y = (double)num;
        num1 = (int)x % 10; num2 = (int)y % 10;

        x /= 10000; y /= 10000;

        if (num1 > 4) {
            x += 0.001;
        }
        if (num2 > 4) {
            y += 0.001;
        }

        printf("%0.3f %0.3f\n", x, y);

    }
    
    return 0;
}

C++: #include <iostream>
#include <stdio.h>
#include <iomanip>
#include <math.h>
using namespace std;

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

	while (1) {
		cin>>a>>b>>c>>d>>e>>f;
		if (cin.eof()) break;

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

		printf("%5.3lf %5.3lf\n", (double)(int)((x*1000.0+0.5))/1000.0, (double)(int)((y*1000+0.5)/1000));
		//cout<<setprecision(4)<<setiosflags(ios::fixed)<<x<<" "<<y<<endl;
	}

	return 0;
}

C++: #include<stdio.h>
int main(void)
{
	int b,a,e,d,f,i,c;
	float y,x;
	while(scanf("%d %d %d %d %d %d",&a,&b,&c,&d,&e,&f)!=EOF)  {
			y=(c*d-a*f)/(b*d-a*e);
			x=(b*f-c*e)/(b*d-a*e);
		if(x<0.0001 && x>-0.0001){
			x=0.000;
		}
		if(y<0.0&&y>-0.0001){
			y=0.000;
		}	
		printf("%.3f %.3f\n",x,y);
	}
	return 0;
}