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<iostream>
#include<iomanip>
#include<algorithm>

using namespace std;

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

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

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

	return 0;
}

C++: #include <algorithm>
#include <vector>
#include <math.h>
#include <stdio.h>
#include <cctype>
#include <iostream>
#include <set>
#include <string>
#include <queue>
#include <map>
using namespace std;
int size(string x){
	string::size_type size=x.size();
	return size;
}
#define fu(l,k) for(int i=l;i<k;i++)
#define fd(l,k) for(int i=l;i>k;i--)
#define fi first
#define se second
typedef  vector<string> vs;
typedef  vector<int> vi;
double pi(){
	return M_PI;
}
typedef set<int> set_i;
typedef set<string> set_s;
int main(){
	double a,b,c,d,e,f,a1;
	while(cin>>a>>b>>c>>d>>e>>f){
		double x,y,x1,y1;
		a1=a;
		a=a*d;
		b=b*d;
		c=c*d;
		d=d*a1;
		e=e*a1;
		f=f*a1;
		y=(c-f)/(b-e);
		x=(f-e*y)/d;
		if(x<0.001&&x>=0) x=0;
		if(y<0.001&&y>=0) y=0;
		if(x<-0.001) x=0;
		if(y<-0.001) y=0;
		printf("%.3lf %.3lf\n",x,y);
	}
}

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

		x = ( (double)( (int)(x * 1000) ) ) / 1000;
		y = ( (double)( (int)(y * 1000) ) ) / 1000;

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

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


/*
//my header
#include "define.h"
#include "geometry.h"*/


void init()
{
#ifdef _WIN32
	freopen("1.txt", "r", stdin);
#endif
}

void func();

int main()
{
	init();
	func();

	return 0;
}


void func()
{
	double a,b,c,d,e,f;
	while(~scanf("%lf%lf%lf%lf%lf%lf", &a, &b, &c, &d, &e, &f))
	{
		double x = (c*e-f*b)/(a*e - b*d);
		double y = (c*d-a*f)/(b*d - a*e);
		printf("%.3lf %.3lf\n", x, y);
	}
}

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

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

    while (!cin.eof()){
        cin>>a>>b>>c>>d>>e>>f;
        double D=a*e-b*d;
        double X=(c*e-f*b)/D,Y=(a*f-d*c)/D;
        if (X==-0.0) X=0.0;
        if (Y==-0.0) Y=0.0;
        printf("%.3lf %.3lf\n",X,Y);

    }
    return 0;
}

C++: #include <iostream>
using namespace std;
 
int main()
{
    double a,b,c,d,e,f;
    while(cin>>a>>b>>c>>d>>e>>f)
    {
        printf("%.3f %.3f\n", (c*e-b*f)/(a*e-b*d)+0.0001, (c*d-a*f)/(b*d-a*e)+0.0001);
    }
}

C++: #include<iostream>
#include<cstdio>
#include<algorithm>
using namespace std;
int main(){
    double a,b,c,d,p,q;
    while(cin>>a>>b>>p>>c>>d>>q){
        double x=(b*q-d*p)/(b*c-a*d);
        double y=(a*q-c*p)/(a*d-b*c);
        if(x<=0.0&&x>-0.00001)x=0.0;
        if(y<=0.0&&y>-0.00001)y=0.0;
        printf("%.3f %.3f\n",x,y);
    }

    return 0;
}

C++: #include <bits/stdc++.h>
#include <math.h>
#include <iomanip>
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);
        //double Y = round(y * 1000); //1000倍して四捨五入して小数第4位までを取得
        //y = Y / 1000;
        x = (c - b * y) / a;
        //double X = round(x * 1000);
      //  x = X / 1000;

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

}

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

C++: #include <math.h>
#include <iostream>
#include <ios>
#include <iomanip>
#include <algorithm>
#include <functional>
#include <string>

#define YES "YES"
#define NO "NO"
#define space ' '

using namespace std;

void func();

int main(void)
{
	
	func();

	return 0;
}

// using matrix	?????????????????´??????
void func()
{
	int a, b, c, d, e, f;
	double x, y;

	while (cin >> a >> b >> c >> d >> e >> f, !cin.eof()){


	//	if ((a*e - d*b) == 0)
		{
		//	cout << 0 << space << 0 << endl;
		}
//		else
		{
			x = (e*c - b*f) / (a*e - d*b);
			y = (-d*c + a*f) / (a*e - d*b);

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

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

const double EPS = 1e-8;
typedef vector<double> vec;
typedef vector<vec> mat;

//Ax = b を解く
//O(n^3)
vec gauss_jordan(const mat &A, const vec &b){
  int n = A.size();
  mat B(n, vec(n+1));
  for(int i=0;i<n;i++)
    for(int j=0;j<n;j++)
      B[i][j] = A[i][j];
  for(int i=0;i<n;i++) B[i][n] = b[i];

  for(int i=0;i<n;i++){
    int pivot = i;
    for(int j=i+1;j<n;j++) if(fabs(B[j][i]) > fabs(B[pivot][i])) pivot = j;
    swap(B[i],B[pivot]);

    //解がないか、あっても一意ではない。
    if(fabs(B[i][i]) < EPS) return vec();
    
    for(int j=i+1;j<=n;j++) B[i][j] /= B[i][i];
    for(int j=0;j<n;j++)
      if(i != j)
	for(int k=i+1;k<=n;k++)
	  B[j][k] -= B[j][i] * B[i][k];
  }
  vec x(n);
  for(int i=0;i<n;i++) x[i] = B[i][n];
  return x;
}

int main(){
  mat A(2,vec(2));
  vec b(2);
  while(cin >> A[0][0] >> A[0][1]){
    cin >> b[0];
    for(int i=0;i<2;i++) cin >> A[1][i];
    cin >> b[1];
    vec ans = gauss_jordan(A, b);
    printf("%.3f %.3f\n",ans[0],ans[1]);
  }
}

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

C++: #include<stdio.h>
int main(void)
{
	int b,a,e,d,f,i,c;
	float y,x;
	while(scanf("%d %d %d %d %d %d",&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);
	}
	return 0;
}