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 <sstream>
using namespace std;

int main() {
    string line;
    while (getline(cin, line)) {
        int a, b, c, d, e, f;
        stringstream ss(line);
        ss >> a >> b >> c >> d >> e >> f;

        double x = 0.0;
        if (c*e != b*f)
            x = static_cast<double>(c*e - b*f) / (a*e - b*d);
        double y = static_cast<double>(c - a*x) / b;
        cout.precision(4);
        cout << showpoint << x << " " << y << endl;
    }
}

C++: #include <cstdio>
#include <iostream>
#include <functional>
#include <algorithm>
#include <string>
#include <cstdarg>
#include <vector>
#include <map>
#include <cmath>

using namespace std;

namespace _{struct _{_(){ // initialize
  cin.tie(0); ios::sync_with_stdio(false);
}}_;}

template <typename T, size_t size>
inline size_t len(const T (&)[size]) { return size; }
inline void println(string s) { cout << s << '\n'; }
inline string format(const char* fmt, ...){
  int size = 512;
  char* buffer = 0;
  buffer = new char[size];
  va_list vl;
  va_start(vl, fmt);
  int nsize = vsnprintf(buffer, size, fmt, vl);
  if (size <= nsize) { //fail delete buffer and try again
    delete[] buffer;
    buffer = 0;
    buffer = new char[nsize+1]; //+1 for /0
    nsize = vsnprintf(buffer, size, fmt, vl);
  }
  string ret(buffer);
  va_end(vl);
  delete[] buffer;
  return ret;
}
#define str to_string
#define rep(i, n) for (int i=0; i<int(n); i++)
#define all(c) (c).begin(), (c).end()
#define max(a, b, c) max(max((a), (b)), (c))
#define min(a, b, c) min(min((a), (b)), (c))


// ax + by = c     || ax = c - by
// dx + ey = f
// x + (b/a)y = c/a
// x + (e/d)y = f/d
// (b/a - e/d)y = c/a - f/d
// y = (c/a - f/d) / (b/a - e/d)
// x = c/a - (b/a)y
int main() {
  double a, b, c, d, e, f;
  string ret = "";
  while (cin >> a >> b >> c >> d >> e >> f) {
    double x = 0, y = 0;
    if (a == 0) {
      y = b/c;
      x = f/d - e*y/d;
    }
    else if (d == 0) {
      y = e/f;
      x = c/a - b*y/a;
    }
    else if (b == 0) {
      x = c/a;
      y = f/e - d*x/e;
    }
    else if (e == 0) {
      x = f/d;
      y = c/b - a*x/b;
    }
    else {
      y = (c/a - f/d) / (b/a - e/d);
      x = c/a - (b/a)*y;
    }

    double a = round(x * 1000);
    double b = round(y * 1000);
    ret += format("%.3f %.3f\n",a / 1000, b / 1000);
  }
  cout << ret;
}

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

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

C++: #include <iostream>
#include <iomanip>
using namespace std;
int main(){
	double x,y,a,b,c,d,e,f;
	while(cin>>a>>b>>c>>d>>e>>f){
		y=(a*f-c*d)/(a*e-d*b);
		x=(c-b*y)/a;
		cout <<fixed<<setprecision(3)<<x<<" "<<y<<endl;
	}
	return 0;
}

C++: #include <iostream>
#include <stack>
#include <map>
#include <algorithm>
#include <sstream>
#include <queue>
#include <string>
#include <iomanip>
#include <cstring>
#include <cstdlib>
#include <cstdio>
#include <cmath>
using namespace std;
#define F first
#define S second
const int INF=100000000;


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

		printf("%.3f %.3f\n",x,y);
		//cout << setprecision(3)  << x << " " << y << endl;
	}
	return 0;
}

C++: #include <iostream>
#include <iomanip>
int main(void)
{
    double a,b,c,d,e,f;
    double x,y;
    std::cout << std::showpoint << std::setprecision(4);
    while(std::cin >> a >> b >> c >> d >> e >> f){
        x = (c * e - b * f) / (a * e - b * d) * 1000;
        x = (int)(x + (x >= 0 ? 0.5 : -0.5)) / 1000.0;
        y = (f * a - c * d) / (a * e - b * d) * 1000;
        y = (int)(y + (y >= 0 ? 0.5 : -0.5)) / 1000.0;
        std::cout << x << " " << y << std::endl;
    }
    return 0;
}

C++: // http://judge.u-aizu.ac.jp/onlinejudge/description.jsp?id=0004
#include <bits/stdc++.h>
using namespace std;

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

  scanf("%lf %lf %lf %lf %lf %lf", &a,&b,&c,&d,&e,&f);

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

  cout<<fixed; // ?°???°?????\??????????????????????????????????????????????????°???????????°??????????????????
  cout<<setprecision(3)<<fabs(x)<<" "<<fabs(y)<<endl;
  return EXIT_SUCCESS;
}

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

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

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

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

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=(a*f-c*d)/(a*e-b*d);
		printf("%.3f %.3f", x, y);
	}

	return 0;

}

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

typedef pair<double,double> P;

P solve(double a, double b, double p, double c, double d, double q){
  P res;
  double tmp = a * d - b * c;
  res.first = (p * d - b * q) / tmp;
  res.second = (a * q - p * c) / tmp;
  return res;
}

double myRound(double x){
  int y = (int)round(x * 1000);
  return y / 1000.0;
}

int main(){
  double a, b, p, c, d, q;

  while(cin >> a >> b >> p >> c >> d >> q){
    double tmp = a * d - b * c;
    double x = (d * p - b * q) / tmp;
    double y = (a * q - c * p) / tmp;

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

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

struct Dataset{
	double a, b, c, d, e, f;
	double x, y;
	struct Dataset* next;
};

int main(){
	double a, b, c, d, e, f;
	struct Dataset *datalist, *p;

	datalist = (struct Dataset*)malloc(sizeof(struct Dataset));
	datalist->next = NULL;

	p = datalist;

	while(scanf("%lf %lf %lf %lf %lf %lf", &a, &b, &c, &d, &e, &f) != EOF){
		p->next = (struct Dataset*)malloc(sizeof(struct Dataset));
		p->next->next = NULL;
		p = p->next;
		p->a = a; p->b = b; p->c = c; p->d = d; p->e = e; p->f = f;
		if(a != 0){
			p->y = (a*f-c*d)/(a*e-b*d);
			p->x = c - b*p->y;
		}
		else{
			p->y = c/b;
			p->x = f/d - e*p->y/d;
		}
	}

	p = datalist;

	while(p->next != NULL){
		printf("%.3f %.3f\n", p->next->x, p->next->y);
		p = p->next;
	}

	return 0;
}