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>
#include<string>
#include<cmath>
#include<queue>
#include<vector>
#include<functional>
#include<algorithm>
#include<cstdio>
using namespace std;
int main() {
	int a, b, c, d, e, f;
	while (cin >> a >> b >> c >> d >> e >> f) {
		int a2 = a, b2 = b, c2 = c;
		int g = a, h = d;
		if (g > h) swap(g, h);
		while (g != 0) {
			int k = g;
			g = h%g;
			h = k;
		}
		h = (h*(a / h)*(d / h));
		if (a2 != 0){
			b = b*(h / a2); 
			c = c*(h / a2);
		}
		else {
			b = 0;
			c = 0;
		}
		if (d != 0) {
			e = e*(h / d);
			f = f*(h / d);
		}
		else {
			e = 0;
			f = 0;
		}
		long double ansx,ansy;
		if (e - b != 0)ansx = ((long double)(f - c) / (e - b));
		else ansx = 0;
		ansy = (c2 - ansx*b2) / a2;
		ansx = ansx * 1000;
		ansx = round(ansx);
		ansx /= 1000;
		ansy = ansy * 1000;
		ansy = round(ansy);
		ansy /= 1000;
		printf("%.3LF %.3LF\n", ansy, ansx);
	}
}

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

using namespace std;

typedef struct {
        double x1;
        double x2;
} answer;

answer solve_simultaneous_equations(double a, double b, double c, double d, double e, double f) {
        answer ans;
        ans.x1 = (c*e - b*f) / (a*e - b*d);
        ans.x2 = (c*d - a*f) / (b*d - a*e);
        return ans;
}

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

        while(cin >> a >> b >> c >> d >> e >> f) {
                answer ans;
                ans = solve_simultaneous_equations(a,b,c,d,e,f);
                cout << showpoint << fixed << setprecision(3) << ans.x1;
                cout << " ";
                cout << showpoint << fixed << setprecision(3) << ans.x2;
                cout << endl;
        }

        return 0;
}

C++: #include<iostream>
#include<algorithm>
#include<vector>
#include<cmath>
#include<string>


using namespace std;


double solveY(int a,int b,int c,int d,int e,int f){
	double ret;
	ret=(double)(a*f-d*c)/(a*e-b*d);
	return ret;
}

int main(){
	while(1){
		int a,b,c,d,e,f;
		if( !(cin>>a>>b>>c>>d>>e>>f) )break;
		double y=solveY(a,b,c,d,e,f);
		double x=(c-b*y)/a;
		printf("%5.3lf %5.3lf",x,y);
	}
	return 0;
}

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

/*
 * Wrong Answer
 * 2015-06-26 02:00
 */

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

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

	return 0;
}

C++: #include "iostream"
#include "iomanip"
using namespace std;

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

C++: #include<iostream>
#include<cstdio>
#include<algorithm>
using namespace std;
int main(){
	double x,y;
	int a,b,c,d,e,f;
	while(cin>>a>>b>>c>>d>>e>>f){
		x=((e*c-b*f) / (a*e-b*d));
		y=((-(d*c)+a*f) / (a*e-b*d));
		printf("%.3f %.3f\n",x,y);
	}
	return 0;
}

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

typedef struct {
    double x;
    double y;
} xy;

int main()
{
    using namespace std;
    double a, b, c, d, e, f, x, y;
    vector<xy> results;
    
    cout.precision(3);
    cout << fixed << showpoint;
    while (cin >> a >> b >> c >> d >> e >> f) {
        double coef = d/a;
        b *= coef; c *= coef;
        y = (c - f)/(b - e);
        x = (f - e*y)/d;
        x = round(x*1000.0)/1000.0;
        y = round(y*1000.0)/1000.0;
        if (x == 0) x = fabs(x);
        if (y == 0) y = fabs(y);
        results.push_back( {x,y} );
        // cout << x << " " << y << endl;
    }
    for (vector<xy>::iterator itr = results.begin();
         itr != results.end(); ++itr) {
        // xy& tmp = *itr;
        cout << itr->x << " " << itr->y << endl;
    }
}

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

int main(){
  double 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)(f-d*x) / e;

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

  }


  return 0;
}

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

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

C++: #include <stdio.h>
double round3(double 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/1000;

	return a;

}
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 <iostream>
#include <iomanip>
using namespace std;

int main(){
	double a , b , c , d , e , f ,ans1 , ans2;
	while(cin>>a>>b>>c>>d>>e>>f){
		ans1=(c*e-b*f)/(a*e-b*d);
		ans2=(c*d-a*f)/(b*d-a*e);
		cout << fixed << setprecision(3) <<  ans1 << " " << fixed << setprecision(3) << ans2 << endl;
	}
	return 0;
}

C++: #include <iostream>
#include <iomanip>
#include <string>
#include <vector>
#include <sstream>

using namespace std;

using DataSet = vector<double>;


void readInputData(vector<string>& input_data){
    string buff;
    while(getline(cin, buff)){
        input_data.push_back(buff);
    }
}

void _parseString(const string& input_data, DataSet& data_set) {
    data_set.resize(6);

    stringstream ss;
    ss << input_data;
    ss >> data_set[0] >> data_set[1] >> data_set[2]
        >> data_set[3] >> data_set[4] >> data_set[5];
}

void parseString(const vector<string>& input_data, vector<DataSet>& data_set) {
    data_set.resize(input_data.size());
    for(int i = 0; i < input_data.size(); ++i) {
        DataSet buff;
        _parseString(input_data[i], buff);
        data_set[i] = buff;
    }
}

double determinant2d(const DataSet& data){
    return data[0] * data[4] - data[1] * data[3];
}

void inverse2d(DataSet& data){
    double t = data[0];
    data[0] = data[4];
    data[4] = t;

    data[1] = -data[1];
    data[3] = -data[3];
}


void calculateXY(const DataSet& data, double det, vector<double>& result){
    result.resize(2);

    result[0] = (data[0] * data[2] + data[1] * data[5]) / det;
    result[1] = (data[3] * data[2] + data[4] * data[5]) / det;
}

void solve(vector<DataSet>& data_set){
    cout << setprecision(3);

    for(int i = 0; i < data_set.size(); ++i){
        vector<double> buff;

        double det = determinant2d(data_set[i]);

        inverse2d(data_set[i]);

        calculateXY(data_set[i], det, buff);

        cout << (buff[0] + 0.0005) << " " << (buff[1] + 0.0005) << endl;
    }
}


void doAllProcess(){
    vector<string> input_data;
    readInputData(input_data);

    vector<DataSet> data_set;
    parseString(input_data, data_set);

    solve(data_set);
}


int main(){
    doAllProcess();
    return 0;
}