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>
using namespace std;


int main()
{
	double x1, y1, a, x2, y2, b;
	for (int i = 0; i < 2; i++)
	{
		cin >> x1 >> y1 >> a >> x2 >> y2 >> b;


		double d1 = x2;
		double d2 = x1;
		double xx1 = d1 * x1;
		double xy1 = d1 * y1;
		double a1 = d1 * a;
		double xx2 = d2 * x2;
		double xy2 = d2 * y2;
		double b1 = d2 * b;
		double y = xy1 - xy2;
		double c = a1 - b1;
		y = c / y;


		d1 = y2;
		d2 = y1;
		xx1 = d1 * x1;
		xy1 = d1 * y1;
		a1 = d1 * a;
		xx2 = d2 * x2;
		xy2 = d2 * y2;
		b1 = d2 * b;
		double x = xx1 - xx2;
		c = a1 - b1;
		x = c / x;
		if (x == 0)
		{
			x = 0;
		}
		if (y == 0)
		{
			y = 0;
		}
		printf("%.3lf %.3lf", x, y);
	}
	return 0;
}

C++: #include <bits/stdc++.h>
#define INT(name) int name; scanf("%d",&name);
#define VINT(name,n) vector<int> name(n); for(int i = 0;i < n;i++) scanf("%d",&name[i]);

using namespace std;

int main(int argc, char const *argv[]){
	int a,b,c,d,e,f;
	while(cin >> a >> b >> c >> d >> e >> f){
		cout.precision(3);
		double answer =(c*e-b*f)/(a*e-b*d);
		cout << std::fixed << answer;
		answer = (a*f-c*d)/(a*e-b*d);
		cout << ' ' << std::fixed << answer << endl;
	}
}

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>
#include <cstdlib>
#include <cstring>
#include <climits>
#include <cmath>
#include <complex>
#include <map>
#include <set>
#include <vector>
#include <stack>
#include <queue>
#include <bitset>
#include <algorithm>
#include <numeric>
#include <functional>
#include <cassert>
#include <iomanip>
using namespace std;

#define Rep(b, e, i) for(int i = b; i <= e; i++)
#define Repr(e, b, i) for(int i = e; i >= b; i--)
#define rep(n, i) Rep(0, n-1, i)
#define repr(n, i) Repr(n-1, 0, i)
#define all(v) (v).begin(), (v).end()
#define pb(v) push_back(v)
#define uniq(v) (v).erase(unique(all(v)),(v).end())
#define bitcnt(x) __builtin_popcount(x)
#define fst first
#define snd second
#define Pqaz(T) priority_queue<T,vector<T>,greater<T>>
#define Pqza(T) priority_queue<T>
#define put(x) cout << x;
#define putsp(x) cout << x << ' ';
#define putbd cout << "---------------------------------------------" << endl;
#define putln(x) cout << x << endl;
#define debug(x) cerr << #x << "=" << x << endl;
#define ENJYU std::ios::sync_with_stdio(false);std::cin.tie(0);
#define yuiyui 0

typedef long long ll;
typedef unsigned long long ul;
typedef pair<int, int> intP;
typedef pair<ll, ll> llP;
typedef pair<ul, ul> ulP;
typedef complex<double> comp;
typedef vector <int> vec;
typedef vector <ll> vecll;
typedef vector <ul> vecul;
typedef vector <double> vecd;
typedef vector <vec> mat;
typedef vector <vecll> matll;
typedef vector <vecul> matul;
typedef vector <vecd> matd;

//vector の中身を出力
template <class T>ostream &operator<<(ostream &o,const vector<T>&v)
{o<<"{";for(int i=0;i<(int)v.size();i++)o<<(i>0?", ":"")<<v[i];o<<"}";return o;}

const int MAX = 200020;
const double PI = 3.14159265358979323846;
const double EPS = 1e-12;
const int INF = 1<<29;
const ll INFL = 1e18;
const ll MOD = 1e9+7;

const int dx[]={1,0,-1,0},dy[]={0,1,0,-1};
//const int dx[]={-1,-1,-1,0,1,1,1,0},dy[]={-1,0,1,1,1,0,-1,-1};

//********************************template END****************************************//

void solve(void){

	long double a,b,c,d,e,f;

	while(~scanf("%Lf%Lf%Lf%Lf%Lf%Lf\n", &a,&b,&c,&d,&e,&f))
	{
		long double x = (c*e-b*f)/(a*e-b*d);
		long double y = (c*d-a*f)/(b*d-a*e);

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

	}

}

int main(void)
{
	solve();
	//cout << "yui(*-v・)yui" << endl;
	return yuiyui;
}

C++: #include <iostream>
#include <algorithm>
#include <cstdio>
#include <cmath>
#include <string>
#include <vector>
#include <set>
#include <stack>
#include <functional>
#define rep(i, n) for(int i = 0; i < n; i++)
#define ll long long
using namespace std;

int main()
{
  cin.tie(0);
  ios::sync_with_stdio(false);
  double a, b, c, d, e, f;
  while(scanf("%lf %lf %lf %lf %lf %lf", &a, &b, &c, &d, &e, &f) != EOF) {
    double y = (c * d- f * a) / (b * d- a * e);
    double x = (c - b * y) / a;
    printf("%0.3f %0.3f\n", x, y);
  }
  return 0;
}

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

int main(){
  int 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);
    if(x == 0) x = 0;
    if(y == 0) y = 0;
    printf("%.3lf %.3lf\n", x, y);
  }
}