Go: package main

import "fmt"

func main() {
	var Xs, Ys []float32
	Xs = make([]float32, 0)
	Ys = make([]float32, 0)
	var cnt int
	for {
		var a, b, c, d, e, f, x, y float32
		fmt.Scanf("%f %f %f %f %f %f", &a, &b, &c, &d, &e, &f)
		if a == 0 {
			break
		}
		y = (((a * f) - (d * c)) / ((a * e) - (b * d)))
		x = ((c - (b * y)) / a)
		Xs = append(Xs, x)
		Ys = append(Ys, y)
		cnt++
	}
	for i := 0; i < cnt; i++ {
		fmt.Printf("%.3f %.3f\n", Xs[i], Ys[i])
	}
}

C++: #include <bits/stdc++.h>	//C++標準ライブラリ一括読み込み
using namespace std;

// ax+by=c
// dx+ey=f
double unko(double x){
	int y=int(round(x*1000));
	return double(y/1000);
}

int main(){
    long long a,b,c,d,e,f;
    cin>>a>>b>>c>>d>>e>>f;
//	long long x=(c*e-b*f)/(a*e-b*d)+0.0005;
//	long long y=(c*d-a*f)/(b*d-a*e)+0.0005;
//	printf("%.3f %.3f",x,y);
	long long x=(c*e-b*f)/(a*e-b*d);
	long long y=(c*d-a*f)/(b*d-a*e);
	printf("%.3f %.3f",unko(x),unko(y));
    return 0;
}

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

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

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


int main(void) {
    int a, b, c, d, e, f;
    
    
    while(scanf("%d %d %d %d %d %d", &a, &b, &c, &d, &e, &f) != EOF) {
        double y = (double)((d*c - a*f) / (b*d-a*e));
        double x = (double)((c - b * y) / a);
        printf("%.3f %.3f",x, y);
    }
    
    return(0);
}

C++: 
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class Main {

	public static void main(String[] args) throws IOException {
		// TODO Auto-generated method stub
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		String line ="";
		while((line = br.readLine())!=null){
			String[] s= line.split(" ");
			int a = Integer.parseInt(s[0]);
			int b = Integer.parseInt(s[1]);
			int c = Integer.parseInt(s[2]);
			int d = Integer.parseInt(s[3]);
			int e = Integer.parseInt(s[4]);
			int f = Integer.parseInt(s[5]);
			int x = (e*c - b*f)/(a*e - b*d);
			int y = (a*f - c*d)/(a*e - b*d);
			System.out.println(x+" "+y);
		}

	}

}

C++: #include <iostream>
using namespace std;
int main(void){
    double A[2][3];
    while(cin >> A[0][0] >> A[0][1] >> A[0][2] >> A[1][0] >> A[1][1] >> A[1][2]){
        for(int i = 1; i < 3; i++){
            A[0][i] /= A[0][0];
        }
        A[0][0] /= A[0][0];
        for(int i = 1; i < 3; i++){
            A[1][i] -= A[0][i] * A[1][0];
        }
        A[1][0] -= A[0][0] * A[1][0];
        for(int i = 0; i < 3; i++){
            if(i != 1)
                A[1][i] /= A[1][1];
        }
        A[1][1] /= A[1][1];
        for(int i = 0; i < 3; i++){
            if(i != 1)
                A[0][i] -= A[1][i] * A[0][1];
        }
        A[0][1] -= A[1][1] * A[0][1];
        
        printf("%.3f %.3f\n", A[0][2], A[1][2]);
    }
}

C++: /* -*- coding:utf-8 -*- */

#include <iostream>
#include <iomanip>

using namespace std;

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


  while(cin >> a >> b >> c >> d >> e >> f, !cin.eof()) {
    double x,y;
    x = (e*c-b*f)/(a*e-b*d);
    y = (-c*d+a*f)/(a*e-b*d);
    cout << fixed << setprecision(3) << showpoint << ((x == -0.0) ? -x : x) << ' ' << ((y == -0.0) ? -y : y) << endl;
  }
  return 0;
}

C++: #include<iostream>
#include<iomanip>
using namespace std;
int main(){
	double a,b,c,d,e,f,x,y,dummy;
	while(1){
		cin>>a>>b>>c>>d>>e>>f;
		dummy=b;
		a*=e;
		b*=e;
		c*=e;
		d*=dummy;
		e*=dummy;
		f*=dummy;
		x=((c-f)/(a-d));
		y=((c-a*x)/b);
		cout<<fixed<<setprecision(4)<<x<<" "<<y<<"\n";
	}
	return 0;
}

C++: #include <stdio.h>

int main() {
	
	double a, b, c, d, e, f;	//scanf
	double x, y;							//ans
	int t, t2;
	
	double n = 0, m = 0, j = 0, h = 0, i = 0;						//temp
	
	while(1){
		
		if (scanf("%lf %lf %lf %lf %lf %lf", &a, &b, &c, &d, &e, &f) == EOF) break;
		
		//printf("%lf %lf %lf\n%lf %lf %lf\n", a, b, c, d, e, f);	//input
		
		n = a / d;                                             //Xツづーツ堕オツつヲツつスツつ「
		j = d * n; h = e * n; i = f * n;
		
		//printf("%lf %lf %lf\n%lf %lf %lf\t\t%lf\n", a, b, c, j, h, i, n);
		
		m = b - h;
		y = c - i;
		//printf("%lf %lf\n", m, y);
		
		if(y != 0) y /= m;
		//printf("%lf\n", y);
		
		i = c - (b * y);
		x = i / a;
		
		//printf("x = %lf, y = %lf\n", x, y);
		
		if(x != 0) if (x > 0) { x += 0.0005; } else { x -= 0.0005; }
		if(y != 0) if (y > 0) { y += 0.0005; } else { y -= 0.0005; }
		
		
		//printf("x = %lf, y = %lf\n", x, y);
		
		x *= 1000;
		y *= 1000;
		
		t = (int)x;
		t2 = (int)y;
		
		//printf("x = %lf, y = %lf t = %d, t2 = %d\n", x, y, t, t2);
		
		x = t;
		y = t2;
		
		x /= 1000;
		y /= 1000;
		
		//printf("%lf %lf\n", x, y);
		printf("%.3lf %.3lf\n", x, y);
		//2 -1 -3 1 -1 -3
		//2 -1 -3 -9 9 27

	}
	return 0;
}

C++: #include <iostream>
#include <stdlib.h>
#include <string.h>
#include <sstream>
#include <iostream>
#include <math.h>
#include <iomanip>

using namespace std;

string float_to_string(float f, int digits)
{
  if (f == 0) {
    f = 0;
  }
  ostringstream oss;
  oss << setprecision(digits) << setiosflags(ios::fixed) << f;
  return oss.str();
}

void calc_and_output(int *c)
{
  float x = (float)(c[1]*c[5]-c[2]*c[4])/(c[1]*c[3]-c[0]*c[4]);
  float y = (float)(c[0]*c[5]-c[2]*c[3])/(c[0]*c[4]-c[1]*c[3]);

  cout << float_to_string(x, 3) << " " << float_to_string(y, 3) << endl;
}

int main(int argc, char const* argv[])
{
  int c[6];

  string line;
  while (getline(cin, line)) {
    istringstream iss(line);
    int val;
    int c[6];
    for (int i = 0; i < 6; i++) {
      iss >> val;
      c[i] = val;
    };

    calc_and_output(c);
  }

  return 0;
}

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

int main(void) {
    double a,b,c,d,e,f;
    double x,y;
    while (1){
        cin >> a;
        if (cin.eof())
            break;
        cin >> b >> c >> d >> e >> f;
        x=(e*c-b*f)/(a*e-b*d);
        y=(-d*c+a*f)/(a*e-b*d);
        printf("%.3f %.3f\n",x,y);
    }
    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)
    {
//        cout << "input numbers: " << a << " " << b << " " << c << " " << d << " " << e << " " << f << endl;

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

//        cout << "before round: " << std::fixed << std::setprecision(4) << x << " " << y << endl;

        x = x * 1000.0;
        y = y * 1000.0;

        x = round(x);
        y = round(y);

        x = x / 1000.0;
        y = y / 1000.0;

//        cout << "after round: " << std::fixed << std::setprecision(4) << x << " " << y << endl;

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

    return 0;
}