Go: package main

import "fmt"

func main() {

	for {
		var a, b, c, d, e, f float64
		var x, y float64
		i, _ := fmt.Scanf("%f %f %f %f %f %f", &a, &b, &c, &d, &e, &f)
		if i != 6 {
			return
		}

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

		fmt.Printf("%.3f %.3f\n", x, y)
	}
}

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

using namespace std;

int main (int argc, char const* argv[])
{
    int a[3],b[3];
    double x,y;
    
    while(cin >> a[0] >> a[1] >> a[2] >> b[0] >> b[1] >> b[2]){
        x = (a[2]*b[1] - a[1]*b[2]) / (a[0]*b[1] - a[1]*b[0]);
        y = (a[2] - a[0]*x)/a[1];
        
        x = round(x * 1000)/1000.0;
        y = round(y * 1000)/1000.0;
        
        printf("%.03lf %.03lf\n",x,y);
    }
    
    return 0;
}

C++: #include<cstdio>
int main(){
    double a[6];
    double x,y;
    while(~scanf("%lf",&a[0])){
        for(int i=1;i<6;i++){
            scanf("%lf",&a[i]);
        }
        y=(a[2]-(a[5]*(a[0]/a[3])))/(a[1]-(a[4]*(a[0]/a[3])));
        x=(a[2]-a[1]*y)/a[0];
        printf("%.3lf %.3lf\n",x,y);
    }
}

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

using namespace std;

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


double x(double, double, double, double, double, double) {

	return (c*e - b*f) / (a*e - b*d);
}

double y(double, double, double, double, double, double) {

	return (a*f - c*d) / (a*e - b*d);
}

double round(double dat, int keta ){

	int fct;
	fct = (int)pow(10, keta - 1);
	dat *= fct;
	dat += (dat < 0) ? -0.5 : 0.5;
	dat = (int)(dat);
	dat /= fct;
	return dat;
}

int main()
{
	double x1, x2, y1, y2;
	cin >> a >> b >> c >> d >> e >> f;

	x1 = x(a, b, c, d, e, f);
	y1 = y(a, b, c, d, e, f);

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

	x2 = x(a, b, c, d, e, f);
	y2 = y(a, b, c, d, e, f);

	cout << fixed << setprecision(3) << round(x1,3) << " " << round(y1,3) << endl;
	cout << fixed << setprecision(3) << round(x2,3) << " " << round(y2,3) << endl;

	return 0;
}

C++: //
//  main.cpp
//  b
//
//  Created by h3037178 on 2017/07/31.
//  Copyright ?? 2017??´ ?????£?????????. All rights reserved.
//

#include<iostream>
#include<iomanip>
#include<cmath>

using namespace std;

int main(){
    for(double a,b,c,d,e,f;cin>>a>>b>>c>>d>>e>>f;){
        double x=(c*e-f*b)/(a*e-d*b);
        double y;
        if(e){
            y=(f-d*x)/e;
        }else{
            y=(c-a*x)/b;
        }
        if(fabs(x)<1e-4){
            x=0;
        }
        if(fabs(y)<1e-4){
            y=0;
        }
        cout<<fixed<<setprecision(3)<<x<<' '<<y<<endl;
    }
    return 0;
}

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

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

C++: #include<stdio.h>
#include <math.h>
int main()
{
int x1, y1;
double a,b,c,d,m,n,x,y;

while(scanf("%lf %lf %lf %lf %lf %lf",&a,&b,&m,&c,&d,&n)!=EOF){
x=1000*(d*m-b*n)/(a*d-b*c);
y=1000*(a*n-c*m)/(a*d-b*c);
x1=x;
y1=y;
x = (double)x1/1000;
y = (double)y1/1000;
printf("%.3lf %.3lf\n", x, y);
}
return 0;
}

C++: #include<cstdio>
int main(void)
{
	int a,b,c,d,e,f;
	float x,y;
	for(int f1=0;f1<2;f1++)
	{
		scanf("%d %d %d %d %d %d",&a,&b,&c,&d,&e,&f);
		y=(a*f-d*c)/((-d)*b+a*e);
		x=(c-b*y)/a;
		printf("%.3f %.3f\n",x,y);
	}
	return 0;
}

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

using namespace std;

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

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

#define MAX 256

int main(void){

	float a, b, c, d, e, f;
	float ansx[MAX], ansy[MAX];

	int i = 0;

	while (scanf("%f%f%f%f%f%f%f", &a,&b,&c,&d,&e,&f) != EOF){
		if (a*e != b*d){
			ansx[i] = (c*e - b*f) / (a*e - b*d);
			ansy[i] = (c*d - a*f) / (b*d - a*e);
			if ((int)(ansx[i] * 10000) % 10 > 4){
				ansx[i] += 0.001;
			}
		}
		i++;
	}

	for (int j = 0; j < i; j++){
		printf("%.3f %.3f\n", ansx[j], ansy[j]);
	}
	
	return 0;
}

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

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

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

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

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

using namespace std;

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

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

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

	cout << fixed << setprecision(3) << x << " " << y << endl;
	//printf("%.3f %.3f\n", x, y);
}

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

int main() {
	double a, b, c, d, e, f,A,B,D,E;
	while (cin >> a >> b >> c >> d >> e >> f) {
		A = e / (a*e - b*d);
		B = -b / (a*e - b*d);
		D = -d / (a*e - b*d);
		E = a / (a*e - b*d); 
		a = A*c + B*f;
		a *= 1000;
		if(a>=0)a += 0.5;
		else a -= 0.5;
		a = int(a);
		a /= 1000;
		b = D*c + E*f;
		b *= 1000;
		if (b >= 0)b += 0.5;
		else b -= 0.5;
		b = int(b);
		b /= 1000;
		cout << fixed << setprecision(3) << a << " " << b << endl;
	}
	return 0;
}

C++: #include<stdio.h>

int main(void){
	double x=0,y=0;
	int a=0,b=0,c=0,d=0,e=0,f=0,i=0,j;
    
    while(scanf("%d %d %d %d %d %d",&a,&b,&c,&d,&e,&f) != EOF)
	{
		y = ( c * d - a * f ) / ( b * d - e * a );

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

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

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

int main()
{
    int a,b,c,d,e,f,t,u,v;
    vector<int> x(0),y(0);
    while (cin>>a>>b>>c>>d>>e>>f)
    {
        x.push_back(0);
        y.push_back(0);
        t=a; u=b; v=c;
        a*=d;  b*=d; c*=d;
        d*=t; e*=t; f*=t;
        y[y.size()-1]=(c-f)/(b-e);
        x[x.size()-1]=(v-u*y[y.size()-1])/t;
    }
    for (int i=0; i<x.size(); i++)
    {
        cout<<x[i]<<".000 "<<y[i]<<".000\n";
    }
    return 0;
}

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

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

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

	return 0;
}

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

C++: #include <stdio.h>

int main(){
	int a,b,c,d,e,f;
	double x,y;
	while((scanf("%d%d%d%d%d%d",&a,&b,&c,&d,&e,&f))!=EOF){

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

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

C++: #include<iostream>
#include<algorithm>
#include<stdio.h>

using namespace std;

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

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