Go: package main

import (
  "fmt"
)

func main() {
  var a,b,c,d,e,f float64
  var x,y float64
  for _, err := fmt.Scan(&a, &b, &c, &d, &e, &f); err == nil;
   _, err = fmt.Scan(&a, &b, &c, &d, &e, &f) {
    y = (a*f-c*d)/(a*e-b*d)
    x = (c-b*y)/a
    fmt.Printf("%.3f %.3f\n", x,y)
  }
}

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

double abs2(const double n){
	if (n < 0) return -(n);
	return n;
}

int main(){
	double a, b, c, d, e, f;
	double x, y;
	double A, B, C;
	const double p = 0.00000001;

	while (cin >> a >> b >> c >> d >> e >> f){
		A = (a*e) - (b*d);
		B = (c*e) - (b*f);
		C = (a*f) - (c*d);

		x = B / A;
		y = C / A;
		
		if (abs2(x) < p) x = 0;
		if (abs2(y) < p) y = 0;

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

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

int main()
{
	double a,b,c,d,e,f;
	double x,y;
	while(cin >> a >>b>>c>>d>>e>>f)
	{
		x= (b*f-c*e)/(b*d-a*e);
		y = (b*c*d-a*c*e-a*b*f+a*c*e)/(b*b*d-a*b*e);
		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;

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

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

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

using namespace std;

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

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

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

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

return 0;
}

C++: #include <bits/stdc++.h>
using namespace std;

int main() {
  for(int i = 0; i < 31; i++){
    int a = 0, b = 0, c = 0, d = 0, e = 0, f = 0;
    double x, y;
    cin >> a >> b >> c >> d >> e >> f;
    /*ax + by = c
      dx + ey = f
      行列で処理...?*/

      if(a == 0 && b == 0 && c == 0 && d == 0 && e == 0 && f == 0){
        break;
      }
      else{
        d * a * x + d * b * y - a * d * x - a * e * y == d * c - a * f;
        (d * b - a * e) * y == d * c - a * f;
        y = (d * c - a * f) / (d * b - a * e);
        x = (c - b * y) / a;

        cout << x << " " << y << endl;
      }
  }

}

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

int main()
{
	std::vector<double> x, y;
	double a, b, c, d, p, q;
	while (scanf("%d %d %d %d %d %d", &a, &b, &p, &c, &d, &q) != EOF)
	{
		x.push_back((d*p - b*q) / (a*d - b*c));
		y.push_back((a*q - c*p) / (a*d - b*c));
	}

	for (int i = 0; i < x.size(); ++i)
		std::cout << x[i] << " " << y[i] << std::endl;
	return 0;
}

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

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){
    x = (c*e - b*f)/(a*e - b*d);
    y = (a*f - c*d)/(a*e - b*d);
    cout<<x<<" "<<y<<endl;
  }
return 0;
}

C++: #include <iostream>
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
double gcd( double m, double n );
double lcm( double m, double n );
int main(int argc, const char * argv[])
{
    double a=0.0;
    double b=0.0;
    double c=0.0;
    double d=0.0;
    double e=0.0;
    double f=0.0;
    double x=0.0;
    double y=0.0;
    
    while(scanf("%lf",&a)!=EOF){
        scanf("%lf",&b);
        scanf("%lf",&c);
        scanf("%lf",&d);
        scanf("%lf",&e);
        scanf("%lf",&f);
        double ad = lcm( a,d );
        printf("%lf\n",ad);
        
        double a2 = ad/a;
        double b2 = b*a2;
        double c2 = c*a2;
        
        double d2 = ad/d;
        double e2 = e*d2;
        double f2 = f*d2;
        
        y = (c2-f2)/(b2-e2);
        x = (c-b*y)/a;
        
        printf("%.3lf",x);
        printf(" ");
        printf("%.3lf\n",y);
        
    }
    
}
double gcd( double m, double n )
{
	if ( ( 0.0 == m ) || ( 0.0 == n ) )
		return 0;
	while( m != n )
	{
		if ( m > n ) m = m - n;
		else         n = n - m;
	}
	return m;
}

double lcm( double m, double n )
{
	if ( ( 0.0 == m ) || ( 0.0 == n ) )
		return 0;
	
	return ((m / gcd(m, n)) * n);
}

C++: //
//  main.cpp
//  CppTest
//
//  Created by Ryu on 2017/02/08.
//  Copyright ?? 2017??´ Ryu. All rights reserved.
//

#include <iostream>
#include <algorithm>
#include <cmath>
using namespace std;

int main(int argc, const char * argv[]) {
    // insert code here...
    cin.tie(0);
    ios::sync_with_stdio(false);
    
    float e[10000][6];
    int n = 0;
    float x[10000], y[10000];
    while (cin >> e[n][0] >> e[n][1] >> e[n][2] >> e[n][3] >> e[n][4] >> e[n][5]) {
        float d = e[n][0] * e[n][4] - e[n][1] * e[n][3];
        x[n] = (e[n][4] * e[n][2] - e[n][1] * e[n][5]) / d;
        y[n] = (0 - e[n][3] * e[n][2] + e[n][0] * e[n][5]) / d;
        //printf("d: %f, x: %.4f, y: %.4f\n", d, x[n], y[n]);
        n++;
    }
    
    
    for(int i = 0; i < n; i++){
        if(x[i] == -0){
            x[i] = 0;
        }
        if(y[i] == -0){
            y[i] = 0;
        }
        printf("%.4f %.4f\n", x[i], y[i]);
    }
    
    
    return 0;
}

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

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)/(a*e - b*d);
    y = (a*f - c*d)/(a*e - b*d);
    cout <<fixed<<setorecision(3)<<x<<" "<<y<<endl;
  }
  return 0;
}

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

void Solve(double a,double b,double c,double d,double e,double f){
    double x,y;

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

    if(x==0)x=0.000;
    if(y==0)y=0.000;

    printf("%4.3f %4.3f\n",x,y);
}
int main(){
    double a,b,c,d,e,f;

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

    Solve(a,b,c,d,e,f);

    }
    
    return 0;
}

C++: #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){
    y = (c*d-a*f) / (b*d-a*e);
    x = (c - b*y) /a;
    printf("%.3f %.3f\n",x,y);
  }
  return 0;
}

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

int main(){
	float a,b,c,d,e,f,i,n;
	while(cin >> a >> b >> c >> d >> e >> f){
		printf("%6.3f %6.3f\n",(c*e-b*f)/(a*e-b*d) ,(c*d-a*f)/(b*d-a*e));
	}
	return 0;
}

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

int main()
{
    double a,b,c,d,e,f;
    double x,y;
    
    while(cin >> a >> b >> c >> d >> e >> f){
        if(b*d - a*e != 0){
         
         double tmp1 = (c*e - b*f),tmp2 = (a*e - b*d),tmp3 = (c*d - a*f),tmp4=(b*d - a*e);
        tmp1 = tmp1/tmp2;
        tmp2 = tmp3/tmp4;
        x = tmp1;
        y = tmp2;
	if(x < 0.0001 && x > -0.0001) x = 0;
	if(y < 0.0001 && y > -0.0001) y = 0;
         printf("%.3f %.3f",x,y);
        }
    }
    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>
using namespace std;

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