Go: package main

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

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]
		var mulA, mulD int
		if a < 0 {
			mulA = a * -1
		} else {
			mulA = a
		}
		if d < 0 {
			mulD = d * -1
		} else {
			mulD = d
		}
		a *= mulD
		b *= mulD
		c *= mulD
		d *= mulA
		e *= mulA
		f *= mulA

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

		bE := b - e
		cF := c - f
		if bE == 0 {
			bE = 1
		}
		y := cF / bE
		x := (c - (y * b)) / a

		fmt.Print(x)
		fmt.Println(".000")
		fmt.Print(y)
		fmt.Println(".000")
	}
}

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

using namespace std;

int main() {
    double a, b, c, d, e, f;
    while(true) {
        cin >> a;
        if(cin.eof()) break;
        cin >> b >> c >> d >> e >> f;
        double det = a * e - b * d;
        if(det == 0.0) break;
        cout << fixed << setprecision(3);
        cout << ((e*c/det-b*f/det)) << " " << ((-d*c/det+a*f/det)) << endl;
    }

    return 0;
}

C++: #include<bits/stdc++.h>
using namespace std;
int main()
{
    int i,j,k,l;
    double a,b,c,d,e,f;
    double sum,x,y,x1,x2,y2,y1;
    while(scanf("%lf%lf%lf%lf%lf%lf",&a,&b,&c,&d,&e,&f)!=EOF)
    {
       x1=(c*e)-(b*f);
       x2=(e*a)-(b*d);
       y1=(d*c)-(f*a);
        y2=(d*b)-(a*e);
       x=x1/x2;
       y=y1/y2;
       if(x==0)
       {
           x=0;
           printf("%.3lf %.3lf\n",x,y);
       }
       else
       {
             printf("%.3lf %.3lf\n",x,y);
       }
}
       return 0;
}

C++: #include <iostream>

using namespace std;

int main(){
	
	double a[6];

	for(int i=0; i<6; i++){
		cin >> a[i];
	}

	double x,y;

	y=(a[2]/a[0]-a[5]/a[3])/(a[1]/a[0]-a[4]/a[3]);

	x = a[2]/a[0] - a[1]/a[0] * y;

	cout << x << " " << y << endl;
	
	double diff = 0.5;

	x<0?(diff=-0.5):(diff=0.5);
	x = (int)(x*1000+diff);
	
	y<0?(diff=-0.5):(diff=0.5); 
	y = (int)(y*1000+diff); 
	

	x /= 1000;y/=1000;
	

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

C++: #include<iostream>
#include<string>
#include<algorithm>
#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=(a*f-c*d)/(a*e-b*d);
    y=(c*e-f*b)/(a*e-b*d);
    printf("%.3lf %.3lf \n",y,x);
  }
}

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

int main(){
        int a,b,c,d,e,f;
        while(std::cin >> a >> b >> c >> d >> e >> f){
                double x, y;
                int p,q;
                p = a * e - d * b;
                q = c * e - f * b;
                x = q / p;
                if(int(x * 10000) % 10 >4) x += 0.001;
                p = b * d - e * a;
                q = c * d - f * a;
                y = q / p;
                if(int(y * 10000) % 10 >4) y += 0.001;
                std::cout << std::fixed << std::setprecision(3) << x << " " << y << std::endl;
        }
        return 0;
}

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

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


int main(void){

  int a;
  int b;
  int c;
  int d;
  int e;
  int f;

  float x;
  float y;

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

  x = a * e - b * d ;
  y = b * d - a * e ;

  if ((x == 0) && (y == 0)){
    cerr << "x?????????y??????????????????" << endl;
    exit(1);
  }else if(x == 0){
    cerr << "x??????????????????" << endl;
    exit(1);
  }else if(y == 0){
    cerr << "y??????????????????" << endl;
    exit(1);
  }else{

    if(c * e - b * f == 0){
      x = 0;
    }else{
      x = ( c * e - b * f ) / x ;
    }

    if(c * d - a * f == 0){
      y = 0;
    }else{
      y = ( c * d - a * f) / y;
    }

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

  return 0;


}

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

using namespace std;

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

C++: #include <cstdio>

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

C++: #include <iostream>

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

    while (std::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);
        printf ("%.3f %.3f\n",
                x == -0 ? 0 : x,
                y == -0 ? 0 : y);
    }

    return 0;
}

C++: #include<iostream>
#include<iomanip>
#include<vector>
#include<map>
#include<string>
using namespace std;
/*
??£???????¨????
	ax + by = c
	dx + ey = f
????§£x, y???????????????????????°??????
*/
int main() {
	int a, b, c, d, e, f;
	int cnt = 0;						//??\??????????????£???????¨????????????°
	std::vector<double> x_vector;		//x????§£???????´?
	std::vector<double> y_vector;		//y????§£???????´?

#if 0
	while (cnt < 2) {
		cin >> a >> b >> c >> d >> e >> f;
#else
	while (cin >> a >> b >> c >> d >> e >> f) {
#endif
		double x = (b * f - c * e) / (b * d - a * e);
		double y = (c * d - a * f) / (b * d - a * e);

		cnt++;
		x_vector.push_back(x);
		y_vector.push_back(y);
	}

	for (unsigned int i = 0; i < cnt; i++) {
		std::cout << std::fixed;
		std::cout << std::setprecision(3) << x_vector[i] << " ";
		std::cout << std::setprecision(3) << y_vector[i] << endl;
	}

	//???????????°
	while (1);

	return 0;
}

C++: #include<iostream>
#include<cstdio>
#include<iomanip>
#include<vector>
using namespace std;
class SimultaneousEquation{ 
    public:
        void solve(int a,int b,int c,int d,int e,int f){ 
            double x,y;
            x=double(c*e-b*f)/(a*e-b*d);
            y=double(c*d-a*f)/(b*d-a*e);
            printf("%.3lf %.3lf\n",x,y);
            }
};
int main(){ 
    int a,b,c,d,e,f;
    SimultaneousEquation inst;
    while(cin>>a>>b>>c>>d>>e>>f){
        inst.solve(a,b,c,d,e,f);
    }
}

C++: #include <iostream>
#include <algorithm>
#include <cstdio>
#include <cmath>
using namespace std;
const double eps = 1e-4;

bool equals(double a, double b) {
  return abs(a-b) < eps;
}

int main() {
  int a, b, c, d, e, f;
  while(cin >> a >> b >> c >> d >> e >> f) {
    double y = (d*c-a*f)/(double)(d*b-a*e);
    double x = (f-e*y)/(double)d;
    if(equals(x,0.0)) x = 0;
    if(equals(y,0.0)) y = 0;
    printf("%.3f %.3f\n", x, y);
  }
  return 0;
}

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

using namespace std;

/* ax + by = c
   dx + ey = f
   
   (x, y) = { (ce - bf) / (ae - bd), (af - cd) / (ae - bd) } */


void Equation2(double a, double b, double c, double d, double e, double f, double& x, double& y)
{
	x = (c * e - b * f) / (a * e - b * d);
	y = (a * f - c * d) / (a * e - b * d);
}

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

	while (cin >> a >> b >> c >> d >> e >> f)
	{
		Equation2(a, b, c, d, e, f, x, y);

		cout << fixed << setprecision(3) << x << ' ' << y << endl;
	}

	return 0;
}