Go: package main

import (
  "fmt"
)

func main() {
  var a,b,c,d,e,f float64
  var x,y float64
  for _, err := fmt.Scan(&a, &b, &c, &d, &e, &f); err == nil;
   _, err = fmt.Scan(&a, &b, &c, &d, &e, &f) {
    y = (a*f-c*d)/(a*e-b*d)
    x = (c-b*y)/a
    fmt.Printf("%.3f %.3f\n", x,y)
  }
}

C++: #include <iostream>
#include <iomanip>
using namespace std;
 
int main() {
    double a, b, c, d, e, f;
    double 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 << setprecision(3) << setiosflags(ios::fixed) << x << ' ' << y << endl;
    }
    return 0;
}

C++: #include <iostream>
#include <vector>
#include <algorithm>
#include <functional>
#include <cassert>
#include <iomanip>
#include <cmath>

#define EPS (1e-6)

void solveSimultaneousEquation(double a, double b, double c, double d, double e, double f, 
                               std::pair<double, double>* pResult)
{
  assert(b * d - a * e != 0);
  std::pair<double, double>& result = *pResult;

  result.first = (b * f - c * e) / (b * d - a * e);
  result.second = (c * d - a * f) / (b * d - a * e);

  if (fabs(result.first) < EPS) {
    result.first = 0.0;
  }
  if (fabs(result.second) < EPS) {
    result.first = 0.0;
  }
}

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

  while (std::cin >> a >> b >> c >> d >> e >> f) {
    std::pair<double, double> result;
    solveSimultaneousEquation(a, b, c, d, e, f, &result);
    std::cout << std::fixed << std::setprecision(3) << result.first << " " << result.second << std::endl;
  }

  return 0;
}

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

using namespace std;

double solutionY();
double solutionX(double);
double a1,b1,c1,d1,e1,f1;

int main(){
  while(cin){
    cin >> a1 >> b1 >> c1 >> d1 >> e1 >> f1;//入力の最後まで処理って何だよ死ね！！
    double x,y;
    
    y = solutionY();
    x = solutionX(y);
    
    if(cin)cout << fixed << setprecision(3) << x << " " << y << endl ;
  }
  return 0;
}

double solutionY(){
  double b,c,e,f;
  b = b1/a1;
  c = c1/a1;

  e = e1/d1;
  f = f1/d1;
  
  return (c - f)/(b - e);
}

double solutionX(double y){
  double b,c;
  b = b1/a1;
  c = c1/a1;
  
  return (c - b*y);
}

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

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 = (c - a * x) / b;
		printf("%.3lf %.3lf\n", (x == -0)?0:x, (y == -0)?0:y);
	}
	return 0;
}

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

int main(int, char**)
{
	double a, b, c, d, e, f = 0;
	while (std::cin >> a >> b >> c >> d >> e >> f)
	{
		double y = std::roundl((c * d - a * f) / (b * d - a * e) * 1000.0) / 1000.0;
		double x = std::roundl((c * e - b * f) / (a * e - b * d) * 1000.0) / 1000.0;
		printf("%.3f %.3f\n", x + 0, y + 0);
	}
}

C++: #include<stdio.h>
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){
    y = (a*f - c*d)/(a*e - d*b);
    x = (c - b*y)/a;
    printf("%.3f %.3f",x,y);
  }
}

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

using namespace std;

/*
aX+bY=c
dX+eY=f
*/

void solve(int a, int b, int c, int d, int e, int f) {
	double x = (f - e*c/b) / (d - e*a/b);
	double y = (c - a*x) / b;
	printf("%4.3f %4.3f\n", x, y);
}

int main() {
	int a, b, c, d, e, f;
	while (cin >> a >> b >> c >> d >> e >> f) {
		solve(a,b,c,d,e,f);
	}
	return 0;
}

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

double RoundOff(double src, int keta);

int main(void)
{
	int a,b,c,d,e,f;
	double x,y;
	
	while(scanf("%d %d %d %d %d %d",&a,&b,&c,&d,&e,&f)!=EOF)
	{
		y = (double)((a*f-d*c)/(-1*d*b+a*e));
		x = (double)((c-b*y)/a);
		
		printf("%.3f %.3f\n",RoundOff(x,4),RoundOff(y,4));
	}
	
	return 0;
}

double RoundOff(double src, int keta)
{
	// 10^keta 
	src *= pow(10.0, (double)(keta-1));
	if(src>0){
		// (int)(num+0.5) cast
		src = (int)(src+0.5);
	}
	else{
		// (int)(num-0.5)
		src = (int)(src-0.5);
	}
	// 10^-keta
	src /= pow(10.0, (double)(keta-1));
	
	return src;
}

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

	return 0;
}

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

void main(){
	int a,b,c,d,e,f;
	
	cout<<"ax+by=c"<<endl<<"dx+ef=f"<<endl;
	cout<<"		????§£???x,y??????????????????"<<endl;
	
	cout<<"a b c d e f >>>>";
	cin>>a>>b>>c>>d>>e>>f;
	
	cout<<"x="<<(e*c-b*f)/(a*e-b*d)
		<<"y="<<(-c*d+a*f)/(a*e-b*d)<<endl;
}

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

int main()
{
	int a,b,c,d,e,f;
	double x,y;
	while(cin>>a>>b>>c>>d>>e>>f)
	{
		-1000 <= a, b, c, d, e, f <= 1000;
		x= (c*e-b*f)/(a*e-b*d);
		y= (c*d-a*f)/(b*d-a*e);
		
		cout<<setprecision(3)<<fixed;
		cout<<x<<" "<<y<<endl;
	}
        cin.get();
        getch();
	return 0;
}

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

using namespace std;

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

C++: #include<stdio.h>
int main(void)
{
	int a,b,c,d,e,f;
	double x,y;
	while(scanf("%d %d %d %d %d %d",&a,&b,&c,&d,&e,&f)!=EOF){
		x=(double)(c*e-b*f)/(a*e-b*d);
		y=(double)(c*d-a*f)/(b*d-a*e);
		if(x==0){
			x=0;
			printf("%0.3f %0.3f\n",x,y);	
		}
		else{
			printf("%0.3f %0.3f\n",x,y);
		}
	}
	return 0;
}

C++: #include <bits/stdc++.h>

using namespace std;

#define Vi vector<int>
#define FOR(i,s,e) for (int i=s; i<e; i++)
#define ITER(v) v.begin(), v.end()

int main() {
    cin.tie(0);
    ios::sync_with_stdio(false);

    int a, b, c, d, e, f;
    double den, x, y;

    while (true) {
        cin >> a >> b >> c >> d >> e >> f;
        if (cin.eof()) { break; }
        den =  a * e - b * d;
        x = static_cast<double>(c * e - b * f) / den;
        y = static_cast<double>(- c * d + a * f) / den;
        cout << fixed << setprecision(3) << x << " " << y << endl;
    }

    return 0;
}

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

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

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

	return 0;

}

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

int main()
{
	double A, B, C, D, E, F, X, Y, G , H;

	while(cin >> A >> B >> C >> D >> E >> F)
	{
		G = A / D;
		D *= G;
		E *= G;
		F *= G;
		Y = (F-C) / (E-B);
		
		D /= G;
		E /= G;
		F /= G;
		H = B / E;
		D *= H;
		E *= H;
		F *= H;
		X = (F-C) / (D-A);

		X= round(X*1000)/1000;
		Y= round(Y*1000)/1000;

		if(Y>-0.0005 && Y<=0.0){
			Y=0;
		}

		if(X>-0.0005 && X<=0.0){
			X=0;
		}

		cout<<fixed<<setprecision(3)<<X<<" "<<fixed<<setprecision(3)<<Y<<endl;
	}

	return 0;
}

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

string toStr(int n);
string intToToStr(int n);

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

  while(cin >> a >> b >> c >> d >> e >> f) {
    a = a * 10000;
    b = b * 10000;
    c = c * 10000;
    d = d * 10000;
    e = e * 10000;
    f = f * 10000;
    
    int x, y;
    int det = a * e - b * d;

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

    cout << toStr(x) << " " << toStr(y) << endl;
  }
}

string toStr(int n) {
  int ipart = n / 10000;
  int fpart = (n - ipart * 10000) + 5;
  return intToString(ipart) + "." + intToString(fpart).substr(0, 3);
}

string intToString(int n) {
  string stream ss;
  ss << n;
  return ss.str;
}