Go: package main

import (
        "fmt"
        "bufio"
        "os"
        "math"
)

func main() {
        var a, b, c, d, e, f float64
        sc := bufio.NewScanner(os.Stdin)
        for sc.Scan() {
                fmt.Sscanf(sc.Text(), "%f %f %f %f %f %f", &a, &b, &c, &d, &e, &f)

                det := a*e - b*d
                x := (e*c - b*f) / det
                y := (a*f - c*d) / det
                if x == 0.0 {
                        x = math.Abs(x)
                }
                if y == 0.0 {
                        y = math.Abs(y)
                }
                fmt.Printf("%.3f %.3f\n", x, y)
        }
}

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[0][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 <cstdio>

using namespace std;

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

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

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];
while(~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]=A[1][1]; inv_A[0][1]=-A[0][1];
inv_A[1][0]=-A[1][0]; inv_A[1][1]=A[0][0];

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


for(int j=0;j<2;j++){
for(int k=0;k<2;k++){
res[j]+=1.0/(double)det *inv_A[j][k]*B[k];
}
}

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

C++: #include<iostream>
using namespace std;
int main(){
  double a, b, c, d, e, f;
  double x, y;
  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<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;
    if(b==e)y=0;
    else {Y=b-e,Z=c-f;
        y=Z/Y;
    }
    x=(c-b*y)/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(1e-10>fabs(x))x=0;
    if(1e-10>fabs(y))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);

    return 0;
}

C++: #include<iostream>
#include<iomanip>
#define x_Formula(a,b,c,d,e,f) (c-(b*f)/e)/(a-(b*d)/e);
#define y_Formula(x,a,b,c) (c-(a*x))/b;

using namespace std;

double x;
double y;

void serch()
{
	int xx,yy;
	xx=x*10000;
	yy=y*10000;
	cout << xx << " " << yy << endl;
	if(xx>0)
		xx+=5;
	else
		xx-=5;
	if(yy>0)
		yy+=5;
	else
		yy-=5;
	x=xx/10000;
	y=yy/10000;
	cout << xx << " " << yy << endl;

}
int main()
{
	double num[6];
	int i;
	
	for(;cin >> num[0];)
	{
		for(i=1;i<6;i++)
			cin >> num[i];
		
		x=x_Formula(num[0],num[1],num[2],num[3],num[4],num[5])
		y=y_Formula(x,num[0],num[1],num[2])
		
		cout << setprecision(3);
		cout << setiosflags(ios::scientific);
		cout << fixed ;
		serch();
		cout << x << " " << y << endl;
	}
}

C++: #include<iostream>
#include<vector>
#include<algorithm>
#include<functional>
#include<iomanip>
using namespace std;
int main(){
	while (true) {
		double a, b, c, d, e, f;
		cin >> a >> b >> c >> d >> e >> f;
		if (cin.eof()) break;
		double x = (b * f - e * c) / (b * d - a * e);
		double y = (c * d - a * f) / (b * d - a * e);
		cout << setprecision(10) << fixed << x << " " << y << "\n";
	}
    return 0;
}

C++: #include <stdio.h>
#include <math.h>

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 det = a*e-b*d;
    double x = round((e*c-b*f)/det*1000)/1000.0;
    double y = round((-d*c+a*f)/det*1000)/1000.0;
    
    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;
    while(cin >> a >> b >> c >> d >> e >> f) {
        double ans_y = (c*d-f*a)/(b*d-e*a);
        double ans_x = (c - b*ans_y) / a;
        ans_x = static_cast<int>((ans_x * 10000 + 0.5)) / 10000.0;
        ans_y = static_cast<int>((ans_y * 10000 + 0.5)) / 10000.0;
        cout << fixed << setprecision(3) << ans_x << " " << ans_y << endl;
    }
}

C++: /* -*- coding:utf-8 -*- */

#include <iostream>
#include <iomanip>
#include <cstdlib>
#include <cmath>

using namespace std;

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


  while(cin >> a >> b >> c >> d >> e >> f, !cin.eof()) {
    double x,y;
    x = (e*c-b*f)/(a*e-b*d);
    y = (-c*d+a*f)/(a*e-b*d);
    cout << fixed << setprecision(3) << showpoint << ((fabs(x) < 1e-4) ? 0 : x) << ' ' << ((fabs(y) < 1e-4) ? 0 : y) << endl;
  }
  return 0;
}

C++: #include <iostream>
#include <vector>
#include <algorithm>
using namespace std;
int main(){
int a,b,c,d,e,f;
double x,y;
while(cin >> a >> b >> c >> d >> e >> f){
y = (c/a-f/d)/(b/a-e/d);
x = (b*y-c)/a;
cout << x << " " << y << endl;
}
}

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

using namespace std;

int main(int argc, char *argv[]) {
  double a, b, c, d, e, f;
  vector<double> xy;

  while (true) {
    cin >> a >> b >> c >> d >> e >> f;
    if (cin.eof())
      break;
    a -= d * b / e;
    c -= f * b / e;
    double x = c / a;
    double y = (f - d * x) / e;
    xy.push_back(x);
    xy.push_back(y);
  }

  for (int i = 0; i < xy.size() / 2; i++)
    printf("%.3lf %.3lf\n", xy[i*2], xy[i*2+1]);
  return 0;
}

C++: #include<bits/stdc++.h>
using namespace std;
#define FOR(i,a,b) for (int i=(a);i<(b);i++)
#define RFOR(i,a,b) for (int i=(b)-1;i>=(a);i--)
#define REP(i,n) for (int i=0;i<(n);i++)
#define RREP(i,n) for (int i=(n)-1;i>=0;i--)
typedef long long LL;
int main(){
        double a,b,c,d,e,f;
        while(cin>>a,cin>>b>>c>>d>>e>>f){
           cout<<setprecision(3)<<fixed<<(b*f-e*c)/(b*d-e*a)<<" "<<(a*f-d*c)/(a*e-d*b)<<endl;
        }
	return(0);
}

C++: #include <stdio.h>
#include <math.h>

int main(){
  int a, b, c, d, e, f;
  scanf("%d",&a);
  scanf("%d",&b);
  scanf("%d",&c);
  scanf("%d",&d);
  scanf("%d",&e);
  scanf("%d",&f);
  
  double x, y;
  x = (double)(c*e-b*f) / (double)(a*e-b*d);
  y = (double)(a*f-c*d) / (double)(a*e-b*d);
  x = (double)round(x*10000.0) / 10000.0;
  y = (double)round(y*10000.0) / 10000.0;
  printf("%f.3 %f.3\n", x, y);
  
  return 0;
}

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

using namespace std;

int main()
{
	int 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 - c * d) / (a * e - b * d);
		printf("%.3f %.3f\n", x + 0.0, y + 0.0);
	}
	return (0);
}

C++: #include<iostream>
#include<stdio.h>

int main(){
	float a,b,c,d,e,f,x,y;
	
	scanf("%f%f%f%f%f%f",&a,&b,&c,&d,&e,&f);
	
	x=(c*e-b*f)/(a*e-b*d);
	y=(c*d-a*f)/(b*d-a*e);
	
	printf("%.3f %.3f",x,y);
	std::cout<<std::endl;
	
	
	return 0;
	
	}