Go: package main

import (
	"bufio"
	"fmt"
	"os"
	"strconv"
	"strings"
)

func gcd(num1, num2 int) int {
	if num2 == 0 {
		return num1
	}
	num3 := num1 % num2
	return gcd(num2, num3)
}

func lcm(num1, num2 int) int {
	if num1%num2 != 0 {
		num3 := gcd(num1, num2)
		for i := 1; ; i++ {
			check := num3 * i
			if check%num1 == 0 && check%num2 == 0 {
				return check
			}
		}
	} else {
		return num1
	}
}

func main() {
	scanner := bufio.NewScanner(os.Stdin)
	for scanner.Scan() {
		strNums := strings.Fields(scanner.Text())
		nums := []int{}
		for _, strNum := range strNums {
			num, _ := strconv.Atoi(strNum)
			nums = append(nums, num)
		}
		a := nums[0]
		b := nums[1]
		c := nums[2]
		d := nums[3]
		e := nums[4]
		f := nums[5]
		lcm := lcm(a, d)
		mulA := lcm / a
		mulD := lcm / d
		a *= mulA
		b *= mulA
		c *= mulA
		d *= mulD
		e *= mulD
		f *= mulD

		if d < 0 {
			d *= -1
			e *= -1
			f *= -1
		}

		bE := b - e
		cF := c - f
		y := cF / bE
		x := (c - (y * b)) / a

		fmt.Printf("%d.000 ", x)
		fmt.Printf("%d.000\n", y)
	}
}

C++: #include<stdio.h>
int main(void)
{
	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=(double)(c*e-b*f)/(a*e-b*d);
		y=(double)(c*d-a*f)/(b*d-a*e);
		if(x<=0){
			x=0;
			printf("%0.3f %0.3f\n",x,y);	
		}
		else{
			printf("%0.3f %0.3f\n",x,y);
		}
	}
	return 0;
}

C++: ///
// File:  0004.cpp
// Author: ymiyamoto
//
// Created on Wed Nov  8 21:45:53 2017
//

#include <cstdint>
#include <iomanip>
#include <iostream>

using namespace std;

int32_t main()
{
  while (true) {
    double a, b, c, d, e, f;
    cin >> a >> b >> c >> d >> e >> f;
    if (cin.eof()) break;

    double x = (e * c - b * f) / (a * e - b * d);
    double y = (a * f - d * c) / (a * e - b * d);
    cout << fixed;
    cout << setprecision(2) << x << " " << y << endl;
  }

  return 0;
}

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

C++: #include<cstdio>
using namespace std;
int main(){
	double matrix[4],ans[2];
	while(scanf("%lf %lf %lf %lf %lf %lf",&matrix[0],&matrix[1],&ans[0],&matrix[2],&matrix[3],&ans[1]) != EOF){
		double t = matrix[0]*matrix[3]-matrix[1]*matrix[2];
		printf("%.3lf %.3lf\n",matrix[3]*ans[0]/t-matrix[1]*ans[1]/t,matrix[0]*ans[1]/t-matrix[2]*ans[0]/t);
	}
	return 0;
}

C++: 
#include <iostream>
#include <cstdlib>
#include <cstdio>
#include <cmath>
#include <stack>
#include <cctype>
#include <complex>
#include <vector>
#include <algorithm>

using namespace std;


bool solve(){

	float a,b,c,d,e,f,g;
	while(cin>> a>> b>> c>> d>> e>> f){
		float x = (1.0/(a*e-b*d)) * (e*c - b*f);
		float y = (1.0/(a*e-b*d)) * (-c*d + a*f);
		printf("%.3f %.3f",x, y);
		printf("\n");
	}
	return true;
}

int main(){
	cout.setf(ios::fixed);
	cout.precision(10);
	solve();

	return 0;
}

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

using namespace std;

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

		

		cout << setiosflags(ios::fixed) << setprecision(3);
		cout << x << " " << y << endl;
	}
	return 0;
}

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

#define REP(i,n) for(int i = 0;i<(int)n;i++)
#define FOR(i,a,b) for(int i = (a);i < (b);i++)
#define RFOR(i,a,b) for(int i = (a);i>(b);i--)

using namespace std;

int main(void){
    
    int i,j=0,k = 0,l=0,m = 0,n= 0;
    double a,b,c,d,e,f;
    double x1[1000],x2[1000];
    
    while((cin >> a >> b >> c >> d >> e >> f))
    {
    
        
        if(cin.eof()){break;}
        
        double gyouretusiki = (a*e - d*b);
    
        x1 [n]= (c/a) - (b/gyouretusiki)*(f -((d*c)/a));
    
        x2[n] = ((a) /(gyouretusiki))*(f-((d*c)/a));
        
    
        REP(i,5)
        {
            x1[n] =x1[n]*10;
            x2[n] = x2[n]*10;
        }
            x1[n] += 0.5;
            x2[n] += 0.5;
            x1[n] = (int)x1[n];
            x2[n] = (int)x2[n];
        REP(i,5)
        {
            x1[n] =x1[n]/10;
            x2[n] = x2[n]/10;
        }
        n++;
    }
    REP(i,n)
    printf("%.3f %.3f\n",x1[n],x2[n]);
    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=(e*c-f*b)/(e*a-b*d);
		y=(d*c-f*a)/(b*d-a*e);
		printf("%.3f %.3f\n",x,y);

	}
}

C++: #include <stdio.h>
#include <math.h>

double RoundOff(double src, int keta);

int main(void)
{
	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)
	{
		y = (double)((a*f-d*c)/(-1*d*b+a*e));
		x = (double)((c-b*y)/a);
		
		printf("%.3f %.3f\n",RoundOff(x,4),RoundOff(y,4));
	}
	
	return 0;
}

double RoundOff(double src, int keta)
{
	// 10^keta 
	src *= pow(10.0, (double)(keta-1));
	if(src>0){
		// (int)(num+0.5) cast
		src = (int)(src+0.5);
	}
	else{
		// (int)(num-0.5)
		src = (int)(src-0.5);
	}
	// 10^-keta
	src /= pow(10.0, (double)(keta-1));
	
	return src;
}

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


double a,b,c,d,e,f;
double A,B;//x,y座標
int main(){
  while(scanf("%lf %lf %lf %lf %lf %lf",&a,&b,&c,&d,&e,&f) !=EOF){
    
    if(a*e-b*d != 0){
      B =(c*e-f*b)/(a*e-b*d);
      A =(c -a*B)/b;
    }
 
    if(A > 0){
    A =floor((A+0.0005)*1000)/1000;
    }
    if(A < 0){
    A =floor((A-0.0005)*1000)/1000;
    }
    if(B > 0){//小数第4位を四捨五入
      B =floor((B+0.0005)*1000)/1000;
    }
    if(B <0){
    B =floor((B-0.0005)*1000)/1000;
    }
    printf("%.3f %.3f\n",B,A);
  }
  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 = (double)(c*e - b*f)/(a*e - b*d);
        y = (double)(c*d - a*f)/(b*d - a*e);
        cout << setprecision(3) << setiosflags(ios::fixed);
        cout << x << ' ' << y << endl;
    }
    return 0;
}

C++: #include<iostream>
#include<iomanip>
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);
    if(y == -0.0) y = 0;
    if(x == -0.0) x = 0;
    cout << fixed << setprecision(3) << x << " " << y << endl;
  }
  return 0;
}

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

using namespace std;
int main(){
    double a,b,c,d,e,f;
    while((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);
        x = round(1000*x) / 1000;
        y = round(1000*y) / 1000;
        if(x==0)x=0;
        if(y==0)y=0;
        cout << fixed << setprecision(3) << x << " " << y << endl;
    }
    return 0;
}

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

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