Go: package main

import "fmt"

func main() {

	for {
		var a, b, c, d, e, f float64
		var x, y float64
		i, _ := fmt.Scanf("%f %f %f %f %f %f", &a, &b, &c, &d, &e, &f)
		if i != 6 {
			return
		}

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

		fmt.Printf("%.3f %.3f\n", x, y)
	}
}

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;
}

C++: #include <iostream>

using namespace std;

void solve()
{
	double a, b, c, d, e, f;
	while(cin >> a >> b >> c >> d >> e >> f)
	{
		double x, y;
		if(a != 0)
		{
			y = a / (a * e - b * d) * (f - c * d / a);
			x = (c - b * y) / a;
		}
		else
		{
			y = d / (b * d - a * e) * (c - a * f / d);
			x = (f - e * y) / d;
		}
		printf("%.3f %.3f\n", x, y);
	}
}

int main()
{
	solve();
	return(0);
}

C++: #include <iostream>
#include <stdio.h>
#include <string>
#include <math.h>
#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*e - b*f) / (a*e - b*d);
  y = (a*f - d*c) / (e*a - b*d);

  if(x == 0){
    x = 0;
  }
  if(y == 0){
    y = 0;
  }

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

 return 0; 
}

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

using namespace std;

int main(){
  double a,b,c,d,e,f;
  vector<double> al,bl,cl,dl,el,fl;
  double x,y,n,m;

  while(cin >> a >> b >> c >> d >> e >> f){
    al.push_back(a);
    bl.push_back(b);
    cl.push_back(c);
    dl.push_back(d);
    el.push_back(e);
    fl.push_back(f);
  }

  for(int i=0; i<al.size(); i++){
    n = bl[i]/el[i];
    m = al[i]/dl[i];
    x = (cl[i]-n*fl[i])/(al[i]-n*dl[i]); 
    y = (cl[i]-m*fl[i])/(bl[i]-m*el[i]);
    cout << setprecision(3) << fixed << x << " " << y << endl;
  }

  return 0;
}

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

int main(){
	
	int a,b,c,d,e,f;
	
	while(cin >> a >> b >> c >> d >> e >> f){
		double x,y;
		
		x = ((c*e)-(b*f))/((a*e)-(b*d));
		y = ((a*f)-(c*d))/((a*e)-(b*d));
		
		/*x *= 1000;
		y *= 1000;
		
		round(x);
		round(y);
		
		x /= 1000;
		y /= 1000;
		*/
		printf("%.3lf %.3lf\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){
		x=(f-c*e/b)/(d-a*e/b);
		y=(f-c*d/a)/(e-b*d/a);

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

	return 0;
}