Go: package main

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

var sc = bufio.NewScanner(os.Stdin)

func read() string {
	sc.Scan()
	return sc.Text()
}

func main() {
	sc.Split(bufio.ScanLines)
	for sc.Scan() {
		s := strings.Split(sc.Text(), " ")
		a, _ := strconv.ParseFloat(s[0], 64)
		b, _ := strconv.ParseFloat(s[1], 64)
		c, _ := strconv.ParseFloat(s[2], 64)
		d, _ := strconv.ParseFloat(s[3], 64)
		e, _ := strconv.ParseFloat(s[4], 64)
		f, _ := strconv.ParseFloat(s[5], 64)
		x := ((b * f) - (c * e)) / ((b * d) - (a * e))
		y := ((a * f) - (c * d)) / ((a * e) - (b * d))
		if x == 0 {
			fmt.Printf("0.000 %.3f\n", y)
		} else if y == 0 {
			fmt.Printf("%.3f 0.000\n", x)
		} else {
			fmt.Printf("%.3f %.3f\n", x, y)
		}
	}
}

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

int main()
{
	double x, y;
	double a, b, c, d, e, f;
	int J = 1;

	while (J){

		J = (int)(cin >> a >> b >> c >> d >> e >> f);

		if (J == 0)
			break;

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

		x *= 10000;
		x = x + 0.5 - (x < 0);
		x = (int)x;
		x /= 10000;

		y *= 10000;
		y = y + 0.5 - (y < 0);
		y = (int)y;
		y /= 10000;


		cout << setprecision(4) << showpoint << x << " " << y << endl;
	}

	return 0;
}

C++: #include <iostream>
#include <array>
#include <vector>
#include <cmath>
#include <iomanip>

using namespace std;

//?????¨?????\
double round_four(double value){
    //0??????
    if ((static_cast<int>(value + 0.5)) < 1){
        return 0.0;
    }
    //?????????
    value *= 1000;
    value += (value / fabs(value)) * 0.5;
    int nValue = static_cast<int>(value);
    value = static_cast<double>(nValue) / 1000;
    return value;
}

//????¬?????¨?????§£
array<double, 2> comp_linear_equation(int a, int b, int c, int d, int e, int f){
    array<double, 2> result;
    result[0] = static_cast<double>(e * c - (f * b));
    result[1] = static_cast<double>(-(d * c) + a * f);
    double num = 1.0 / ((a * e) - (b * d));
    result[0] *= num;
    result[1] *= num;
    result[0] = round_four(result[0]);
    result[1] = round_four(result[1]);
    return result;
}

//?????????
int main(){
    int a, b, c, d, e, f;
    vector<array<double, 2>> result;
    while (cin >> a >> b >> c >> d >> e >> f){
        result.push_back(comp_linear_equation(a, b, c, d, e, f));
    }
    for (const auto& element : result){
        for (auto num : element){
            cout << fixed << setprecision(3) << num << " ";
        }
        cout << endl;
    }
    return 0;
}

C++: #include <iostream>
#include <stdio.h>
#define EE 0.0000001

using namespace std;
  
int main(void){
    double a,b,c,d,e,f,delta,kai,kait;
    while(1){
	    if( scanf("%lf %lf %lf %lf %lf %lf",&a,&b,&e,&c,&d,&f) == EOF) break;
		delta=a*d-b*c;
		kai=(d*e-b*f)/(delta);
		kait=(a*f-e*c)/(delta);
		if((kai >= 0-EE) && (kai <= 0+EE)) kai = 0.0;
		printf("%.3f %.3f\n",kai,kait);
    }
    return 0;
}

C++: #include<stdio.h>
int main(){
	int X,Y;
double a,b,c,d,e,f,x,y;
double p[2][3]={0};
y=0;x=0;
 while(scanf("%lf %lf %lf %lf %lf %lf", &a, &b, &c, &d, &e, &f) != EOF){

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

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

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

using namespace std;

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


double x(double, double, double, double, double, double) {

	return (c*e - b*f) / (a*e - b*d);
}

double y(double, double, double, double, double, double) {

	return (a*f - c*d) / (a*e - b*d);
}

double round(double , int ){
	int fct;
	double dat;
	int keta;

	fct = (int)pow(10, keta - 1);
	dat *= fct;
	dat += (dat < 0) ? -0.5 : 0.5;
	dat = (int)(dat);
	dat /= fct;
	return dat;
}

int main()
{
	double x1, x2, y1, y2;
	cin >> a >> b >> c >> d >> e >> f;

	x1 = x(a, b, c, d, e, f);
	y1 = y(a, b, c, d, e, f);

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

	x2 = x(a, b, c, d, e, f);
	y2 = y(a, b, c, d, e, f);

	cout << fixed << setprecision(3) << round(x1,3) << " " << round(y1,3) << endl;
	cout << fixed << setprecision(3) << round(x2,3) << " " << round(y2,3) << endl;

	return 0;
}

C++: #include<bits/stdc++.h>
using namespace std;

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

/// Ax=b
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(abs(B[j][i])<abs(B[pivot][i]))pivot=j;
        }
        swap(B[i],B[pivot]);
        if(abs(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)continue;
            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);

    for(int i=0;i<2;i++){
        scanf("%lf%lf%lf",&A[i][0],&A[i][1],&b[i]);
    }

    vec x=gauss_jordan(A,b);
    if(x.size()<2)return 0;
    printf("%lf %lf\n",x[0],x[1]);
    return 0;
}

C++: #include <iostream>
#include <cstdio>
#include <vector> 
#include <iomanip>
int main()
{
	std::vector<double> x, y;
	double a, b, c, d, p, q;
	while (scanf("%d %d %d %d %d %d", &a, &b, &p, &c, &d, &q) != EOF)
	{
		x.push_back((d*p - b*q) / (a*d - b*c));
		y.push_back((a*q - c*p) / (a*d - b*c));
	}

	for (int i = 0; i < x.size(); ++i)
		std::cout << std::setprecision(10) << x[i] << " " << y[i] << std::endl;
	return 0;
}

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

int main(){
	double a,b,c,d,e,f;
	while(std::cin>>a>>b>>c>>d>>e>>f){
		double x,y;
		y=(c*d-a*f)/(b*d-a*e);
		x=(c-b*y)/a;
		if(x==0)x=0.000;
		if(y==0)y=0.000;
		printf("%.3f %.3f\n",x,y);
	}
	return 0;
}

C++: #include <stdio.h>

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

    while(scanf("%f %f %f %f %f %f", &a, &b, &c, &d, &e, &f) != EOF)
    {
        x =(c*e - b*f)/(a*e - b*d);
        y =(a*f - c*d)/(a*e - b*d);
        if(x == -0)
        {
            x = 0;
        }
        if(y == -0)
        {
            y = 0;
        }
        
        printf("%.3f %.3f\n", x, y);

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

C++: #include<iostream>
#include<stdio.h>
using namespace std;
int main(){
    float a,x,b,y,c,f,e,d,y2;
    while(cin>>a>>b>>c>>d>>e>>f){
        y2=b*e*y;
              x=(c*e-f*b-y2*2)/(a*e-d*b);
                y=(c-(a*x))/b;
        
        printf("%.3f %.3f",x,y);cout<<endl;}
    
    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) {
        x = (c * e - b * f) / (a * e - b * d);
        y = (c - a * x) / b;
        cout << fixed << setprecision(3) << x << " " << 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;
    while (1) {
        cin >> a;
        cin >> b;
        cin >> c;
        cin >> d;
        cin >> e;
        cin >> f;
        if (cin.eof()) break;
        x = (double)(c * e - b * f) / (double)(a * e - b * d);
        y = (double)(c * d - a * f) / (double)(b * d - a * e);
        if (x == -0.0) x = 0.0;
        if (y == -0.0) y = 0.0;
        cout << fixed << setprecision(3) << x << ' ' << y << endl;
    }
    return 0;
}