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

C++: #include<stdio.h>
int main()

{
    int a,b,c,d,e,f;
    while(~scanf("%d%d%d%d%d%d",&a,&b,&c,&d,&e,&f))
    {
        
        float x=(c*e-b*f)/(a*e-b*f);
        float y=(c*d-a*f)/(b*d-a*e);
        printf("%.3f %.3f\n",x,y);
        
    }
    return 0;
}

C++: #include <stdio.h>

/* INPUT TYPE:
** Ax + By = C
** Dx + Ey = F
*/

int main(){
  float A, B, C, D, E, F, ans_x, ans_y = 0;
  scanf("%f %f %f %f %f %f", &A, &B, &C, &D, &E, &F);

  // x?????????AD???
  B = B*D;
  C = C*D;
  E = E*A;
  F = F*A;


  ans_y = (C-F) / (B-E);
  ans_x = (C-B*ans_y) / (A*D);

  printf("%.3f %.3f\n", ans_x, ans_y);

  return 0;
}

C++: #include <iostream>

using namespace std;

int main( void ) {
    double a, b, c, d, e, f;
    while(cin >> a >> b >> c >> d >> e >> f) {
        double y = ((c*d - a*f) / (b*d - a*e));
        double x = ((c*e - f*b) / (a*e - b*d));
        int iy = (int)(y * 1000);
        int ix = (int)(x * 1000);
        y = iy / 1000.0; x = ix / 1000.0;
        printf("%.3f %.3f\n", x, y);
    }
    return 0;
}

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

C++: #include <stdio.h>
int main(){double a,b,c,d,e,f;while(scanf("%lf %lf %lf %lf %lf %lf",&a,&b,&c,&d,&e,&f)!=-1){f=(c*e-b*f)/(a*e-b*d);printf("%.3lf %.3lf\n",f,(-a*f+c)/b);}return 0;}

C++: #include<stdio.h>
#include<stdlib.h>
int main(){
	int a,b,c,d,e,f;
	float x,y;
	while(scanf("%d%d%d%d%d%d",&a,&b,&c,&d,&e,&f)!=EOF){
		if((b>=0&&e>=0)||(b<0&&e<0)){
			x=(c*e-f*b)/(a*e-d*b);
		}
		else{
			x=(c*e+f*b)/(a*e+d*b);
		}
		y=(c-a*x)/b;
		printf("%1.3f %1.3f\n",x,y);
	}
	return 0;
}

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

#include <math.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)
	{
		G = A / D;
		D *= G;
		E *= G;
		F *= G;
		Y = (F-C) / (E-B);
		
		D /= G;
		E /= G;
		F /= G;
		H = B / E;
		D *= H;
		E *= H;
		F *= H;
		X = (F-C) / (D-A);

		if(Y==0){
			Y=0.000;
		}

		if(X==0){
			X=0.000;
		}

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

	return 0;
}

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

using namespace std;

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

	vector<string> v;
	while (cin >> a >> b >> c >> d >> e >> f) {
		double x, y;

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

		x = x * 1000;
		x = round(x);
		x = x / 1000;

		y = y * 1000;
		y = round(y);
		y = y / 1000;

		stringstream ss;
		ss << fixed << setprecision(3) << x << " " << y;
		v.push_back(ss.str());
	}
	
	for (int i = 0; i < v.size(); i++) {
		cout << v[i] << 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 << fixed << 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] << " " << buff[1] << 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;
}

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

using namespace std;

int det(int a, int b, int c, int d) {
	return a * d - b * c;
}

int main() {
	int a[6];
	while(cin) {
		for(int i = 0; i < 6; i++)
			cin >> a[i];
		int d = det(a[0], a[1], a[3], a[4]);
		int x1 = det(a[2], a[1], a[5], a[4]);
		int x2 = det(a[0], a[2], a[3], a[5]);
		cout << setprecision(3) << fixed << 1. * x1 / d << " ";
		cout << setprecision(3) << fixed << 1. * x2 / d << 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 = (double)(c*e - b*f)/(a*e - b*d);
        y = (double)(c*d - a*f)/(b*d - a*e);
        cout << setprecision(3) << setiosflags(ios::fixed);
        cout << x+0.0000000001 << ' ' << y+0.0000000001 << endl;
    }
    return 0;
}

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

using namespace std;

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

	while(cin >> a >> b >> c >> d >> e >> f){
			delta = (a * e) - (b * d);

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

			if(x == 0) x = 0;
			if(y == 0) y = 0;

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

	return 0;
}

C++: #include<stdio.h>
int main(){
	int X,Y;
double a,b,c,d,e,f,x,y;
double p[2][3]={0};
y=0;x=0;
 while(scanf("%lf %lf %lf %lf %lf %lf", &a, &b, &c, &d, &e, &f) != EOF){

y=(d*c-a*f)/(b*d-a*e);
x=(e*c-b*f)/(e*a-b*d);
X=x*10000;
Y=y*10000;
if((X)%10>=5)x+=0.0005;
else if((X)%10<=-5)x-=0.0005;
if((Y)%10>=5)y+=0.0005;
else if((Y)%10<=-5)y-=0.0005;

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

C++: #include <cstdio>

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){
		x = (double)(e*c-b*f)/(e*a-b*d);
		y = (double) (c-a*x)/b;
		if(0.0001>x&&x>-0.0001) x=0;
		if(0.0001>x&&x>-0.0001) y=0;
		printf("%.3f %.3f\n",x,y);
	}
	return 0;
}