Go: package main

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

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

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

double round(double num);
/*
??£???????¨????
	ax + by = c
	dx + ey = f
????§£x, y???????????????????????°??????
*/
int main() {
	double a, b, c, d, e, f;
	int cnt = 0;						//??\??????????????£???????¨????????????°
	std::vector<double> x_vector;		//x????§£???????´?
	std::vector<double> y_vector;		//y????§£???????´?

#if 0
	while (cnt < 1) {
		cin >> a >> b >> c >> d >> e >> f;
#else
	while (cin >> a >> b >> c >> d >> e >> f) {
#endif
		double x = (b * f - c * e) / (b * d - a * e);
		double y = (c * d - a * f) / (b * d - a * e);

		cnt++;
		x_vector.push_back(x);
		y_vector.push_back(y);
	}

	for (unsigned int i = 0; i < cnt; i++) {
		//double x_result = round(x_vector[i]);
		//double y_result = round(y_vector[i]);

		std::cout << std::fixed;
		std::cout << std::setprecision(3) << x_vector[i] << " ";
		std::cout << std::setprecision(3) << y_vector[i] << endl;
		//std::cout << std::setprecision(3) << x_result << " ";
		//std::cout << std::setprecision(3) << y_result << endl;
		//std::cout << std::setprecision(3) << 1.23456 << endl;
	}

	//???????????°
	//while (1);

	return 0;
}

//?°???°????¬¬4???????????¨?????\????????¢??°
double round(double num) {
	int num_mul_10000 = (int)(double)(num * 10000);
	int num_mul_1000  = (int)(double)(num * 1000);
	int dummy;

	//???????????°
	cout << num_mul_10000 << " " << num_mul_1000 << endl;
	dummy = num_mul_10000 - num_mul_1000 * 10;
	cout << dummy << endl;
	//if (5 <= (num_mul_10000 - num_mul_1000 * 10)) {
	if (5 <= dummy) {
		return num + 0.001;
	}
	else {
		return num;
	}
}

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

int main(){
	double a, b, c, d, e, f;
	while(std::cin >> a){
		std::cin >> b >> c >> d >> e >> f;
		std::cout << std::fixed << std::setprecision(3)
			<< (c * e - b * f) / (a * e - b * d) << ' '
			<< (a * f - c * d) / (a * e - b * d) << std::endl;
	}
	return 0;
}

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

// ax + by = e1
// cx + dy = e2
auto solve (double a , double b , double e1 , double c , double d , double e2) -> std::pair <double , double>
{
    auto delta = a * d - b * c;
    return std::make_pair ((d * e1 - b * e2) / delta , (a * e2 - c * e1) / delta);
}

auto show (double v) -> std::string
{
    char s [100];
    if (-0.0005 < v && v < 0)
    {
        return "0.000";
    }
    std::sprintf (s , "%.3f" , v);
    return s;
}

auto main () -> int
{
    double a , b , c , d , e , f;
    while (std::cin >> a >> b >> c >> d >> e >> f)
    {
        auto xy = solve (a , b , c , d , e , f);
        std::cout << show (xy.first) << ' ' << show (xy.second) << std::endl;
    }
}

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

int main(){
	cout << fixed << setprecision(3);
	double a,b,c,d,e,f;
	double x,y;
	while(cin >> a >> b >> c >> d >> e >> f){
		y = ((d * c) - (a * f)) / ((d * b) - (a * e)) ;
		x = (c - (b * y)) / a;
		if(x == 0) x = 0;
		if(y == 0) y = 0;

		cout << x << " " << y << "\n";
	}

}

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

using namespace std;

int main() {
	double a, b, c, d, e, f;
	while (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);
		cout << fixed << setprecision(3) << (x) << " " << round(y) << endl;
	}
}

C++: #include<iostream>
#include<sstream>
#include<string>
#include<algorithm>
#include<cmath>
#include<cstdio>
#include<map>
#include<vector>
#include<queue>
#include<set>
#include<numeric>

using namespace std ;

#define pb(n) push_back(n)
#define fi first
#define se second
#define np string::npos
#define all(r) (r).begin(),(r).end()
#define gsort(st,en) sort((st),(en),greater<int>())
#define vmax(ary) *max_element(all(ary))
#define vmin(ary) *min_element(all(ary))
#define debug(x) cout<<#x<<": "<<x<<endl

#define rep(i,n) for(int i = 0; i < (int)(n);++i)
#define repc(i,a,b) for(int i = (a);i < (int)(b);++i)
#define repi(it,array) for(auto it = array.begin(),end = array.end(); it != end;++it)
#define repa(n,array) for(auto n :(array))

typedef long long ll ;
typedef vector<int> vi ;
typedef vector<ll> vl ;
typedef map<string,int> dict;

constexpr int imax = ((1<<30)-1)*2+1 ;
constexpr int inf = 100000000;
double eps = 1e-10 ;

template <typename T>
void out(vector < T > v)
{
  for(size_t i = 0; i < v.size(); i++)
  {
    debug(v[i]);
  }
}

template<typename T>
string ntos( T i ) {
  ostringstream s ;
  s << i ;
  return s.str() ;
}

template<typename T>
T ston(string str, T n){
  istringstream sin(str) ;
  T num ;
  sin >> num ;
  return num ;
}

int main(){
  cin.tie(0);
  ios::sync_with_stdio(false);
  double a,b,c,d,e,f,x,y;
  while(cin >> a >> b >> c >> d >> e >> f){
    x = (b*f-e*c)/(b*d-e*a) * 1000 ;
    if(x >= 0){
      x += 0.5 ;
    }
    else{
      x -= 0.5 ;
    }
    x = ((int)(x))/1000 ;
    y = (c*d-a*f)/(b*d-e*a) * 1000 ;
    if(y >= 0){
      y += 0.5 ;
    }
    else{
      y -= 0.5 ;
    }
    y =((int)(y))/1000 ;
    cout << x << " " << y << endl;
  }
  return 0;
}

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

int main(){
	float x, y;
	int a, b, c, d, e, f;
	string p, q;
	while (true){
		cin >> a >> b >> c >> d >> e >> f;
		if (cin.eof()){
			break;
		}
		if (a == 0){
			y = c / b;
			x = (f - e * y) / d;
		}
		else if (b == 0){
			x = c / a;
			y = (f - d * x) / e;
		}
		else if(d == 0){
			y = f / e;
			x = (c - b * y) / a;
		}
		else if(e==0){
			x = f / d;
			y = (c - a * x) / b;
		}
		else{
			x = (c*e - b*f) / (e*a - b*d);
			y = (c - a*x) / b;
		}
		cout << x << " " << y << endl;
	}
	return 0;
}

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

int main(){
	
	double a, b, c, d, e, f, x=0, y=0; // ???????°???°?????°??? %f
	cin >> a >> b >> c >> d >> e >> f;

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

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