Go: package main

import (
	"bufio"
	"fmt"
	"os"
	"strconv"
	"strings"
)

func gcd(num1, num2 int) int {
	if num2 == 0 {
		return num1
	}
	num3 := num1 % num2
	return gcd(num2, num3)
}

func lcm(num1, num2 int) int {
	if num1%num2 != 0 {
		num3 := gcd(num1, num2)
		for i := 1; ; i++ {
			check := num3 * i
			if check%num1 == 0 && check%num2 == 0 {
				return check
			}
		}
	} else {
		return num1
	}
}

func main() {
	scanner := bufio.NewScanner(os.Stdin)
	for scanner.Scan() {
		strNums := strings.Fields(scanner.Text())
		nums := []int{}
		for _, strNum := range strNums {
			num, _ := strconv.Atoi(strNum)
			nums = append(nums, num)
		}
		a := nums[0]
		b := nums[1]
		c := nums[2]
		d := nums[3]
		e := nums[4]
		f := nums[5]
		lcm := lcm(a, d)
		mulA := lcm / a
		mulD := lcm / d
		a *= mulA
		b *= mulA
		c *= mulA
		d *= mulD
		e *= mulD
		f *= mulD

		if d < 0 {
			d *= -1
			e *= -1
			f *= -1
		}

		bE := b - e
		cF := c - f
		y := float64(cF) / float64(bE)
		x := (float64(c) - (y * float64(b))) / float64(a)

		if x == 0 {
			fmt.Printf("%.3f ", 0.0)
		} else {
			fmt.Printf("%.3f ", x)
		}
		if y == 0 {
			fmt.Printf("%.3f\n", 0.0)
		} else {
			fmt.Printf("%.3f\n", y)
		}
	}
}

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


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 y = ((d*c - a*f) / (b*d-a*e));
        double x =  ((c - b * y) / a);
        printf("%.3f %.3f",x, y);
    }
    
    return(0);
}

C++: const int tt = 10000;

#include<iostream>
#include<string>
#include<sstream>
using namespace std;

string toStr(int n);
string intToString(int n);

int main() {
  int a, b, c, d, e, f;
  
  while(cin >> a >> b >> c >> d >> e >> f) {
    c = c * tt;
    f = f * tt;

    int det = a * e - b * d;

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

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

string toStr(int n) {
  string pm, val;
  
  if (n < 0) {
    pm = "-";
    n = -n;
  } else {
    pm = "";
  }

  int ipart = n / tt;
  int fpart = (n - ipart * tt) + tt + 5;

  val = pm + intToString(ipart) + "." + intToString(fpart).substr(1, 3);
  return val;
}

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

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

int main() {
	float 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);
		cout << fixed << setprecision(3) << x << " " << fixed << setprecision(3) << y << endl;
	}
	return 0;
}

C++: #include<iostream>
#include<cstdio>
using namespace std;
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<stdio.h>
int main(){
	double a,b,c,d,e,f;
	double x,y,z,v;
	scanf("%ld %ld %ld %ld %ld %ld",&a,&b,&c,&d,&e,&f);
	x=(c*e-b*f)/(a*e-b*d);
	y=(c*d-a*f)/(b*d-a*e);
	if(x>=-0.0005&&x<0.0005)	x=0;
	if(y>=-0.0005&&y<0.0005)	y=0;
	printf("%.3lf %.3lf\n",x,y);
}

C++: #include <iostream>
#include <cmath>
#include <string>
#include <vector>
#include <map>
#include <set>
#include <list>
#include <deque>
#include <algorithm>
#include <iomanip>
#include <functional>

#define REP(i, n) for(int i = 0;i < (n); i++)
#define REP2(i, x, n) for(int i = (x); i < (n); i++)
#define REPR(i, n) for(int i = (n); i >= 0; i--)

#define ALL(a) (a).begin(),(a).end()
#define SORT(c) sort((c).begin(),(c).end())
#define DESCSORT(c) sort(c.begin(), c.end(), greater<int>())

#define LL long long int
#define LD long double

#define PI 3.14159265358979

using namespace std;

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

//	ax + by = c
//	dx + ey = f

	double A, B, C, D, E, F, X, Y;
	while(cin >> A >> B >> C >> D >> E >> F) {

	X = (double)(E * C - B * F) / (A * E - B * D);
	Y = (double)((-(D * C) + A * F) / (A * E - B * D));

	cout << fixed << setprecision(3) << X << "\n";
	cout << fixed << setprecision(3) << Y << "\n";
	}
	return 0;
}

C++: #include <functional>
#include <algorithm>
#include <iostream>
#include <sstream>
#include <cstring>
#include <iomanip>
#include <fstream>
#include <climits>
#include <cctype>
#include <cstdio>
#include <string>
#include <vector>
#include <bitset>
#include <queue>
#include <stack>
#include <cmath>
#include <ctime>
#include <deque>
#include <list>
#include <map>
#include <set>
using namespace std;

/*** typedef ***/
typedef long long LL;
typedef unsigned int ui;
typedef unsigned long long ULL;
typedef pair < int , int > ii;
typedef pair < LL  , LL  > ll;
typedef vector <int>  vint;
typedef vector <bool> vbool;
typedef vector <long> vlong;

/*** define ***/
#define sz(x)			((int)x.size())
#define tin(x)			scanf("%d",&x)
#define all(x)			x.begin(),x.end()
#define Set(b,a)		memset(b,a,sizeof b)
#define print1(x)		printf("Case %d:",x++)
#define tin2(x,y)		scanf("%d%d",&x,&y)
#define tin3(x,y,z)		scanf("%d%d%d",&x,&y,&z)
#define loop(i,i0,in)	for(int i=i0 ; i<in ; i++)
#define rep(i,n)		for(int i=0 ; i<(n) ; i++)
#define _rep(i,n)		for(int i=n-1 ; i>=0 ; i--)
#define _loop(i,in,i0)	for(int i=in-1 ; i>=i0 ; i--)
#define Fore(it, x)		for(typeof (x.begin()) it = x.begin(); it != x.end (); it++)
     
int main()  
{  
#ifdef Online_Judge
	freopen("a.in","r",stdin);
#endif
	long long a,b,c,d,e,f;
	while(cin >> a >> b >> c >> d >> e >> f)
	{
		long double x=((c*e) - (b*f))/((a*e)-(b*d));
		long double y=((a*f) - (c*d))/((a*e)-(b*d));
		printf("%.3lf %.3lf\n",x,y);
	}
	return 0;
}

C++: #include <stdio.h>
float round3(float a){
	a=a*10000;
	if(int(a)%10>5){
		a=a+10-int(a)%10;
	}else{
		a=a-int(a)%10;
	}
	
	a=double (int (a/10));
	a=a/10000;

}
int main(){
	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=(c*d-a*f)/(b*d-a*e);
		x=(c-b*y)/a;
		
		x=round3(x);
		y=round3(y);
		
		printf("%0.3lf %0.3lf\n",x,y);
	}
	return 0;
}

C++: #include <cmath>
#include <iomanip>
#include <iostream>
#include <vector>
#define N 2
 
using namespace std;
typedef vector< vector<double> > Equation;
 
int main()
{ 
    Equation c(N, vector<double>(N + 1));
	while (cin)
	{
		// input
		for (int i = 0; i < N; ++i)
			for (int j = 0; j < N + 1; ++j)
				cin >> c[i][j];

		// Gaussian elimination
		// 1. Forward elimination
        for (int i = 0; i < N - 1; ++i)
            for (int j = i + 1; j < N; ++j)
            {
                double d = c[j][i] / c[i][i];
                for (int k = i + 1; k <= N; ++k)
                    c[j][k] -= c[i][k] * d;
            }
 
		// 2. Back substitution
        for (int i = N - 1; i >= 0; --i)
        {
            double d = c[i][N];
            for (int j = i + 1; j < N; ++j)
                d -= c[i][j] * c[j][N];
            c[i][N] = d / c[i][i];
        }
 
		for (int i = 0; i < N; ++i)
			if (abs(c[i][N]) == 0.0)
				c[i][N] = 0.0;

        cout << setprecision(3) << fixed << c[0][N];
        for (int i = 1; i < N; ++i)
            cout << " " << c[i][N];
        cout << endl;
    }
 
    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*1000;
	yy=y*1000;
//	cout << xx << " " << yy << endl;
	if(xx>0)
		xx+=5;
	else
		xx-=5;
	if(yy>0)
		yy+=5;
	else
		yy-=5;
	x=xx/1000;
	y=yy/1000;
//	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;
	}
}