Go: package main

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

var sc = bufio.NewScanner(os.Stdin)

func main() {
	sc.Split(bufio.ScanWords)
	for {
		data := nextInts(6)
		if data[0] == 0 || data[1] == 0 || data[2] == 0 || data[3] == 0 || data[4] == 0 || data[5] == 0 {
			break
		}
		fmt.Printf("%.3f\n", Round(GetX(data[0], data[1], data[2], data[3], data[4], data[5]), 3))
		fmt.Printf("%.3f\n", Round(GetY(data[0], data[1], data[2], data[3], data[4], data[5]), 3))
	}
}

func GetX(a, b, c, d, e, f float64) float64 {
	return ((c * e) - (b * f)) / ((a * e) - (b * d))
}

func GetY(a, b, c, d, e, f float64) float64 {
	return ((c * d) - (a * f)) / ((b * d) - (a * e))
}

func Round(f float64, places int) float64 {
	shift := math.Pow(10, float64(places))
	return math.Floor(f*shift+.5) / shift
}

func next() string {
	sc.Scan()
	return sc.Text()
}

func nextInt() float64 {
	a, _ := strconv.Atoi(next())
	return float64(a)
}

func nextInts(n int) []float64 {
	a := make([]float64, n)
	for i := 0; i < n; i++ {
		a[i] = nextInt()
	}
	return a
}

C++: #include <iostream>
#include <vector>
#include <map>

using namespace std;

int main()
{
int a,b,c,d,e,f;
double A[2][2];
double B[2];
double inv_A[2][2];
while(~scanf("%d %d %d %d %d %d",&a,&b,&c,&d,&e,&f)){
int det = a*e-b*d;
A[0][0]=a; A[0][1] = b;
A[1][0]=d; A[1][1] = e;
B[0] = c;
B[1] = f; 

inv_A[0][0]=1.0/(double)det *A[1][1]; inv_A[0][1]=1.0/(double)det *-A[0][1];
inv_A[1][0]=1.0/(double)det *-A[1][0]; inv_A[1][1]=1.0/(double)det *A[0][0];

double res[2];
res[0]=0;
res[1]=0;


for(int j=0;j<2;j++){
for(int k=0;k<2;k++){
res[j]+=inv_A[j][k]*B[k];
}
}

printf("%.3f %.3f\n",res[0],res[1]);
}
}

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

double shisyagonyu(double x){
  if(x>0){
    x += 0.0005;
  }
  if(x<0){
    x -= 0.0005;
  }
  return x;
}

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

  while(std::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);

    std::cout << x;
    std::cout << " " << y << std::endl;
*/
    x = shisyagonyu((c*e-b*f)/(a*e-b*d));
    y = shisyagonyu((a*f-c*d)/(a*e-b*d));

    std::cout << std::fixed;
    std::cout << std::setprecision(3) << x;
    std::cout << " " << y << std::endl;

  }
}

C++: #include <bits/stdc++.h>
using namespace std;
typedef long long LL;
#define REP(i,N) for(int i = 0; i < (int)N; i++)

double det(double a1,double a2,double a3,double a4){
	return a1*a4-a2*a3;
}

int main(){
	double a,b,c,d,e,f;
	while(cin >> a >> b >> c >> d >> e >> f){
		double g,h,i;
		g = det(a,b,d,e);
		h = det(c,b,f,e);
		i = det(a,c,d,f);
		double j,k;
		j = h/g;
		k = i/g;
		j = round(j*pow(10,4))/pow(10,4);
		k = round(k*pow(10,4))/pow(10,4);
		printf("%.4f %.4f",j,k);
	}
	return 0;
}

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

int main()
{
	double a[6], x, y;

	while(cin>>a[0]){
		for(int i = 1; i < 6; i++){
			cin>>a[i];
		}
		y = (a[2]*a[3]-a[0]*a[5])/(a[1]*a[3]-a[0]*a[4]);
		x = (a[2]-a[1]*y)/a[0];

		x = ((double)((int)(x*1000+0.5)))/1000;
		y = ((double)((int)(y*1000+0.5)))/1000;

		printf("%.03f %.03f\n", x, y);
	}
}

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

		//小数点以下４桁で四捨五入して表示
		cout << fixed << setprecision(3) << x << " " << y << endl;
	}

	return 0;
}

C++: #include <iostream>
#include <cstdio>
#include <cmath>
using namespace std;
int main() {
  int a, b, c, d, e, f;
  double x, y;
  while (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);
  }
  return 0;
}

C++: #include <bits/stdc++.h>
using namespace std;

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

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

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++: /*
	ax+by=c,
	 dx+ey=f
	x=(E1*B2-B1*E2)/(A1*B2-B1*A2)
	y=(E2*A1-E1*A2)/(A1*B2-A2*B1)
*/

#include<iostream>
#include <iomanip>
#include<math.h>
#include<list>
#include<string>
#define round(d, n)	 (double((d) * pow(10, n) + 0.5) / pow(10, n))
using namespace std;

int main(){
	double a,b,c,d,e,f;
	double x, y;
	list<double> xy;
	
	while(!(cin>>a>>b>>c>>d>>e>>f).eof()){
		xy.push_back((c*e-f*b)/(a*e-b*d));
		xy.push_back((f*a-d*c)/(a*e-d*b));
	}
	list<double>::iterator it = xy.begin();
	while(it != xy.end()){
		x = *it;
		it++;
		y = *it;
		cout << fixed << setprecision(3) << round(x,4) << " " << round(y,4) << endl;
		it++;
	}
}

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

int main(){
	double a11,a12,c,a21,a22,f;
	while(cin>>a11>>a12>>c>>a21>>a22>>f){
		double x,y,delta=((double)a11*a22-(double)a12*a21);
		x=((double)a22*c-(double)a12*f)/delta;
		y=((double)a11*f-(double)c*a21)/delta;
		if(x>0){x=(double)(((int)((x*1000)+0.5))/1000);
		}else if(x<0){x=(double)(((int)((x*1000)-0.5))/1000);}else{x=0;}
		if(y>0){y=(double)(((int)((y*1000)+0.5))/1000);
		}else if(y<0){y=(double)(((int)((y*1000)-0.5))/1000);}else{y=0;}
		cout<<fixed<<setprecision(3)<<x<<" "<<y<<endl;
	}
	return 0;
}

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 = (c*e-b*f)/(a*e-b*d);
    y = (a*f-c*d)/(a*e-b*d);
    cout << fixed << setprecision(3) << x << " " <<  y << endl;
  }
}

C++: #include <stdio.h>

int main(void) {
	int a, b, c, d, e, f;
	while (scanf("%d%d%d%d%d%d", &a, &b, &c, &d, &e, &f) == 6) {
		int det = a*e - b*d;
		int x = e*c - b*f;
		int y = -d*c + a*f;
		printf((x == 0 ? "0.000 " : "%.3f "), x/(double)det);
		printf((y == 0 ? "0.000\n" : "%.3f\n"), y/(double)det);
	}
	return 0;
}

C++: #include <iostream>
#include <iomanip>
#include <stdio.h>

using namespace std;

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

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

		printf("%.3f %.3f\n",X,Y);
	}
}

C++: #include <bits/stdc++.h>
using namespace std;
#define rep(i,n) for(int i=0; i<(n); i++)
#define FOR(i,x,n) for(int i=x; i<(n); i++)
#define ALL(n) begin(n),end(n)
#define MOD (1000000007)
#define INF (1e9)
#define INFL (1e18)
 
typedef long long ll;
typedef unsigned int ui;
typedef unsigned long long ull;
template<class T>using arr=vector<vector<T>>;
template<class T>void pr(T x){cout << x << endl;}
template<class T>void prvec(vector<T>& a){rep(i, a.size()-1){cout << a[i] << " ";} cout << a[a.size()-1] << endl;}
template<class T>bool chmax(T &a, const T &b) { if (a<b) { a=b; return 1; } return 0; }
template<class T>bool chmin(T &a, const T &b) { if (b<a) { a=b; return 1; } return 0; }
 
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)/(a*e - b*d);
        int xi = (int)1000*x;
        int yi = (int)1000*y;
        printf("%.3f %.3f\n", xi/1000.0, yi/1000.0);
    }
    return 0;}