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 := float64(cF) / float64(bE)
		x := (float64(c) - (y * float64(b))) / float64(a)

		if x == 0 {
			fmt.Printf("%.3f ", 0.0)
		} else {
			fmt.Printf("%.3f ", x)
		}
		if y == 0 {
			fmt.Printf("%.3f\n", 0.0)
		} else {
			fmt.Printf("%.3f\n", y)
		}
	}
}

C++: #include <iostream>
#include <cstdio>
#define N 2
using namespace std;

class Calc{
    public:
    double A[N][N+1];
    int i, j, k;
    double tmp;
    void calcSi();
    void printSi();
};

void Calc::calcSi(){
    for(i=0;i<N-1;i++){
        for(j=i+1;j<N;j++){
            tmp = A[j][i] / A[i][i];
            for(k=i+1; k<=N; k++)
                A[j][k] -= A[i][k] * tmp;
        }
    }

    for(i=N-1; i>=0; i--){
        tmp = A[i][N];
        for(j=i+1;j<N;j++)
            tmp -= A[i][j] * A[j][N];
        A[i][N] = tmp / A[i][i];
    }
}

void Calc::printSi(){
    for(i=0;i<N;i++){
        printf("%.3f",A[i][N]);
        if(i != N) {
            cout << " ";
        }
    }
    cout << endl;
}

int main(void){
    Calc c;
    while(cin >> c.A[0][0] >> c.A[0][1] >> c.A[0][2] >> c.A[1][0] >> c.A[1][1] >> c.A[1][2]){
        c.calcSi();
        c.printSi();
    }
    return 0;
}

C++: 
#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) {
		y = (c * d - f * a) / (b * d - e * a);
		x = (c - b * y) / a;
		cout << fixed;
		cout << setprecision(3) << x << " " << y << endl;
	}
	return 0;
}

C++: #include <iostream>
using namespace std;
int main() {
	int i;
	double a[2], b[2], c[2], x, y;
	cin >> a[0] >> b[0] >> c[0] >> a[1] >> b[1] >> c[1];
	if (a[0] == 0) {
		y = c[0] / b[0];
		x = (c[1] - b[1] * y) / a[1];
	}
	else if (b[0] == 0) {
		x = c[0] / a[0];
		y = (c[1] - a[1] * x) / b[1];
	}
	else if (a[1] == 0) {
		y = c[1] / b[1];
		x = (c[0] - b[0] * y) / a[0];
	}
	else if (b[1] == 0) {
		x = c[1] / a[1];
		y = (c[0] - a[0] * x) / b[0];
	}
	else {
		x = (c[1] - c[0] * b[1] / b[0]) / (a[1] - a[0] * b[1] / b[0]);
		y = (c[0] - a[0] * x) / b[0];
	}
	x = x * pow(10,3);
	x = round(x);
	x = x * pow(10, -3);
	y = y * pow(10, 3);
	y = round(y);
	y = y * pow(10, -3);
	cout << x << endl << y << endl;
	return 0;
}

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

int main() {
	double a, b, c, d, e, f;
	while (cin >> a >> b >> c >> d >> e >> f) {
		printf("%.3f", (c*e - b*f) / (a*e - d*b));
		cout << ' ' ;
		printf("%.3f", (c*d - a*f) / (b*d - a*e));
		cout << endl;
	}
}

C++: #include <iostream>
using namespace std;
int main() {
  int a, b, c, d, e, f;
  while (cin >> a >> b >> c >> d >> e >> f) {
    printf("%.3f %.3f\n", (1.0 * b * f - c * e) / (b * d - a * e), (1.0 * a * f - c * d) / (a * e - b * d));
  }
  return 0;
}

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

using namespace std;

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

  while(cin>>a>>b>>c>>d>>e>>f){
    y=(a*f-c*d)/(a*e-b*d);
    x=(c-b*y)/a;
    cout<<fixed<<setprecision(3)<<x<<" "<<y<<endl;
  }

  return 0;
}

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

using namespace std;

int main()
{
int a,b,c,d,e,f;
double A[2][2];
double B[2];
double inv_A[2][2];
scanf("%d %d %d %d %d %d",&a,&b,&c,&d,&e,&f);
int det = a*e-b*d;
A[0][0]=a; A[0][1] = b;
A[1][0]=d; A[1][1] = e;
B[0] = c;
B[1] = f; 

inv_A[0][0]=1.0/(double)det *A[1][1]; inv_A[0][1]=1.0/(double)det *-A[1][1];
inv_A[1][0]=1.0/(double)det *-A[1][0]; inv_A[1][1]=1.0/(double)det *A[0][0];

double res[2];
res[0]=0;
res[1]=0;

for(int i=0;i<2;i++){
for(int j=0;j<2;j++){
for(int k=0;k<2;k++){
res[i]+=inv_A[j][k]*B[k];
}
}
}

printf("%.3f %.3f\n",res[0],res[1]);
}

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

int main(int argc, char **argv){
	double a = 0;
	double b = 0;
	double c = 0;
	double d = 0;
	double e = 0;
	double f = 0;

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

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

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

double Cut(double figure,int keta)
{
	for(int i=0; i<keta+1; ++i)
	{
		figure *= 10.0;
	}

	int figureI = figure;

	figureI = figureI-figureI%10+(figureI%10>=5 ? 10 : 0);//四捨五入　一回1の桁を0として、1の位が5以上なら〜と場合分け

	figure = figureI;

	for(int i=0; i<keta+1; ++i)
	{
		figure /= 10.0;
	}

	return figure;
}

int main()
{
	std::cout << std::setprecision(3);//小数点以下の”表示”桁数
	
	std::cout << std::setiosflags(std::ios::fixed);
	
	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);

		std::cout << Cut(x,3) << ' ' << Cut(y,3) << '\n';
	}
	
}

C++: #include <stdio.h>

int main(void)
{
	int ren[3];
	int ren2[3];
	float x;
	float y;
	float z;
	
	while (scanf("%d %d %d %d %d %d",&ren[0],&ren[1],&ren[2],&ren2[0],&ren2[1],&ren2[2]) != EOF){
		x = (double)(ren[2]*ren2[1] - ren2[2]*ren[1]) / (ren[0]*ren2[1] - ren2[0]*ren[1]);
		y = (double)(ren[2]*ren2[0] - ren2[2]*ren[0]) / (ren[1]*ren2[0] - ren2[1]*ren[0]);
		
		printf("%.3f %.3f\n",x,y);
	}
	return(0);
}

C++: #include<stdio.h>
#include<math.h>
int main(void){
    double a,b,c,d,e,f,A,x,y,X,Y,Z;

    while(scanf("%lf%lf%lf%lf%lf%lf",&a,&b,&c,&d,&e,&f)!=EOF){
    A=a;
    a=a*d,b=b*d,c=c*d;
    d=d*A,e=e*A,f=f*A;

    Y=b-e,Z=c-f;
    y=Z/Y;
    x=(c-y*b)/a;
    /*x=x+0.0005,y=y+0.0005;
    x=x*1000,y=y*1000;
    x=floor(x);
    y=floor(y);
    x=x/1000,y=y/1000;
    if(x==-0)x=0;
    if(y==-0)y=0;*/
   printf("%.3lf %.3lf\n",x,y);
    }
   // printf("\na%lf\nb%lf\nc%lf\nd%lf\ne%lf\nf%lf\n%lf\n%lf",a,b,c,d,e,f,Y,Z);


    }

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

using namespace std;

int main(){
  int 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 <<x<<" "<<y<<endl;
  }
  return 0;
}

C++: #include<stdio.h>
#include<stdlib.h>
#include<iostream>
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=(c*d-a*f)/(b*d-a*e);
		if(x==-0)x=0;
		if(y==-0)y=0;
		printf("%.3lf %.3lf\n",x,y);
	}
    return 0;
	
}

C++: #include <iostream>
#include <iomanip>
#include <cmath>
using namespace std;
int main() {
    cin.tie(0);
    ios::sync_with_stdio(false);
    int a, b, c, d, e, f;
    while (cin >> a >> b >> c >> d >> e >> f) {
        double x = round((e * c - b * f) / (e * a - b * d) * 1000) / 1000;
        double y = round((c - a * x) / b * 1000) / 1000;
        cout << fixed << setprecision(3) << x << " " << y << "\n";
    }
}

C++: #include <cstdio>

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

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

	return 0;
}