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("%04f %04f\n", x, y)
        }
}

C++: #include <iostream>
#include <stdio.h>
using namespace std;
int main(void){
    double A[2][3];
    while(cin >> A[0][0] >> A[0][1] >> A[0][2] >> A[1][0] >> A[1][1] >> A[1][2]){
        for(int i = 1; i < 3; i++){
            A[0][i] /= A[0][0];
        }
        A[0][0] /= A[0][0];
        for(int i = 1; i < 3; i++){
            A[1][i] -= A[0][i] * A[1][0];
        }
        A[1][0] -= A[0][0] * A[1][0];
        for(int i = 0; i < 3; i++){
            if(i != 1)
                A[1][i] /= A[1][1];
        }
        A[1][1] /= A[1][1];
        for(int i = 0; i < 3; i++){
            if(i != 1)
                A[0][i] -= A[1][i] * A[0][1];
        }
        A[0][1] -= A[1][1] * A[0][1];
        
        printf("%.3f %.3f\n", A[0][2], A[1][2]);
    }
}

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

/*
??£???????¨????
	ax + by = c
	dx + ey = f
????§£x, y???????????????????????°??????
*/
int main() {
	double a, b, c, d, e, f;
	int cnt = 0;						//??\??????????????£???????¨????????????°
	std::vector<double> x_vector;		//x????§£???????´?
	std::vector<double> y_vector;		//y????§£???????´?

#if 0
	while (cnt < 1) {
		cin >> a >> b >> c >> d >> e >> f;
#else
	while (cin >> a >> b >> c >> d >> e >> f) {
#endif
		if (
			((a < -1000) || (1000 < a)) ||
			((b < -1000) || (1000 < b)) ||
			((c < -1000) || (1000 < c)) ||
			((d < -1000) || (1000 < d)) ||
			((e < -1000) || (1000 < e)) ||
			((a < -1000) || (1000 < f))
			) {
			break;
		}
		double x = (b * f - c * e) / (b * d - a * e);
		double y = (c * d - a * f) / (b * d - a * e);

		cnt++;
		x_vector.push_back(x);
		y_vector.push_back(y);
	}

	for (unsigned int i = 0; i < cnt; i++) {
		std::cout << std::fixed << std::setprecision(3) << x_vector[i] << " ";
		std::cout << std::fixed << std::setprecision(3) << y_vector[i] << endl;
	}

	cnt = 0;
	x_vector.clear();
	y_vector.clear();

	//???????????°
	//while (1);

	return 0;
}

C++: #include<stdio.h>


double shishagonyu(double x){
	if(x > 0){
		x = (int)(x*1000 + 0.5);
	}else if(x < 0){
		x = (int)(x*1000 - 0.5);
	}
	return x/1000;
}


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

	while(scanf("%lf %lf %lf %lf %lf %lf", &a, &b, &c, &d, &e, &f) != EOF){
		double r = b*d - a*e;
		double x = (b*f - c*e)/r;
		double y = (c*d - a*f)/r;
		printf("%0.3f %0.3f\n", x, y);
	}

	return 0;
}

C++: #include <sstream>
#include <iostream>
#include <iomanip>
#include <stdio.h>
#include <math.h>
#include <vector>
#include <string>
using namespace std;

int main(void) {
	double a=0,b=0,c=0,d=0,e=0,f=0;
	string rx,ry;
	vector<string> r;
	while (scanf("%lf %lf %lf %lf %lf %lf",&a,&b,&c,&d,&e,&f) != EOF){
		double x=0,y=0;
		x = round((b*f-e*c)/(b*d-a*e)*1000+0.0001)/1000.0;
		y = round((a*f-d*c)/(a*e-b*d)*1000+0.0001)/1000.0;
		ostringstream os;
		os.setf(ios::showpoint);
		os << setprecision(4) << x << " " << y;
		r.push_back(os.str());
	}
	for (int i=0;i<r.size();i++)
	{
		cout << r[i] << endl;
	}
	return 0;
}

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

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

	cin >> a >> b >> c >> d >> e >> f;

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

	cout << showpoint << setprecision(3);
	cout << setiosflags( ios::fixed );
	cout << ( x == -0.0 ? 0.0 : x ) << " " << ( y == -0.0 ? 0.0 : y ) << endl;
}

C++: #include<stdio.h>
#define rep(i,m,n) for(i = m;i < n;i++)
int main(){
	double a[6];
	int i,kcor = 0;
	double kx[1000] = {0},ky[1000] = {0};
	while(scanf("%d",a)!=-1){
		rep(i,1,6)
			scanf("%d",a+i);
		double det;
		det = a[0]*a[4]-a[1]*a[3];
		kx[kcor] = (a[4]*a[2]-a[1]*a[5])/det;
		ky[kcor] = (-a[3]*a[2]+a[0]*a[5])/det;
		kcor++;
	}
	rep(i,0,kcor){
		printf("%.3lf %.3lf\n",kx[i],ky[i]);
		//printf("%lf %lf\n",kx[i],ky[i]);
	}
	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){
        if(a<0){
            a=-a;
            b=-b;
            c=-c;
        }
        if(d<0){
            d=-d;
            e=-e;
            f=-f;
        }
        y=((c*d)-(a*f))/((b*d)-(a*e));
        x=((b*f)-(c*e))/((b*d)-(a*e));
        printf("%.3lf %.3lf\n",x,y);
    }
    return 0;
}

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

int main()
{
    using namespace std;
    double a, b, c, d, e, f, x, y;
    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); y = round(y*1000)/1000;
        x = (f - e*y)/d; x = round(x*1000)/1000;
        cout << x << " " << y << endl;
    }
}

C++: #include <stdio.h>

int main(void)
{
	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){
		if(e*a > b*d){		
			x = (e*c - b*f) / (e*a - b*d);
			y = (d*c - a*f) / (e*a - b*d) * (-1);
		}
		else{
			x = (e*c - b*f) / (b*d - e*a) * (-1);
			y = (d*c - a*f) / (b*d - e*a);
		}

		printf("%.3f %.3f\n", x, y);
	}
	return 0;
}

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

using namespace std;

double delta(double o, double p, double q , double r, double s, double t) {

	//cout << "o=" << o << "s=" << s << "v=" << "r=" << "o*s-p*r=" << (o*s-p*r)  << endl;

	// |o  p ||x|   |q|
	// |r  s ||y| = |t|

	return (o*s-p*r);//a???o b???p c???q d???r e???s f???t
}

double deltacfbe(double o, double p, double q , double r, double s, double t) {

	//cout << "o=" << o<< "s=" << s << "p=" << "r=" << "q*s-p*t=" << q*s-p*t  << endl;

	// x = |q  p | /delta
	//     |t  s | 

	return (q*s-p*t);
}

double deltaadcf(double o, double p, double q , double r, double s, double t) {

	//cout << "o=" << o<< "s=" << s << "p=" << "r=" << "o*t-q*r=" << o*t-q*r  << endl;

	// y = |o  q | /delta
	//     |r  t | 

	return (o*t-q*r);
}

int main() {

	double a, b, c, d, e, f;
	
	while (cin >> a >> b >> c  >> d >> e >> f){

	cout << setprecision(3) << (deltacfbe(a,b,c,d,e,f)/delta(a,b,c,d,e,f))  << (deltaadcf(a,b,c,d,e,f)/delta(a,b,c,d,e,f)) << 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 = (c*d - a*f) / (b*d - a*e);

	cout << fixed << setprecision(3) << x << " " << endl;
}
}

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

int main(){
	double a , b , c , d , e , f ,ans1 , ans2;
	while(cin>>a>>b>>c>>d>>e>>f){
		ans1=(double)((c*e-b*f)/(a*e-b*d));
		ans2=(double)((c*d-a*f)/(b*d-a*e));
		if (ans1==0) ans1=0;
		if (ans2==0) ans2=0;
		printf("%.3f %.3f\n" , ans1 , ans2);
	}
	return 0;
}

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

int main()
{
	double x, y;
	double a, b, c, d, e, f;
        int J = 1;

	while (J){

                J = cin >> a >> b >> c >> d >> e >> f;

                if ( J == 0)
                         break;

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

		x *= 10000;
		x = x + 0.5 - (x < 0);
		x = (int)x;
		x /= 10000;

		y *= 10000;
		y = y + 0.5 - (y < 0);
		y = (int)y;
		y /= 10000;


		cout << setprecision(4) << showpoint << x << " " << y << endl;
	}

	return 0;
}