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 <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() {
  cin.tie(0);
  ios::sync_with_stdio(false);
  
  double a, b, c, d, e, f;
  while (cin >> a >> b >> c >> d >> e >> f) {
    double det = a * e - b * d;
    double x = e * c / det - b * f / det;
    double y = a * f / det - d * c / det;
    cout << fixed;
    cout << setprecision(3) << x << " " << setprecision(3) << y << endl;
  }
}

C++: #include<stdio.h>

int main(){
	double x1,y1,z1,x2,y2,z2,num1=0,x=0,y=0,z=0,sum1=0,sum2=0,vx=0,vy=0,vz=0;
	
	scanf("%lf %lf %lf %lf %lf %lf",&x1,&y1,&z1,&x2,&y2,&z2);
	
	
	
	
	if((x1>0&&x2>0)||(x1<0&&x2>0)){
		num1=x2/x1*-1;
	}
	else if((x1>0&&x2<0)||(x1<0&&x2<0)){
		num1=x2/x1;
	}
	else if()
	
	
	vx=x1*num1;
	vy=y1*num1;
	vz=z1*num1;
	
	x=vx+x2;
	y=vy+y2;
	z=vz+z2;
		
	sum2=z/y;
	sum1=(z2-y2*sum2)/x2;
	
	
	
	
	if(sum1>=0){
	sum1=(int)(sum1*1000+0.5);
	sum1=(double)(sum1/1000);
	}
		else if(sum1<0){
	sum1=(int)(sum1*1000-0.5);
	sum1=(double)(sum1/1000);
	}
	if(sum2>=0){
	sum2=(int)(sum2*1000+0.5);
	sum2=(double)(sum2/1000);
	}
		else if(sum2<0){
	sum2=(int)(sum2*1000-0.5);
	sum2=(double)(sum2/1000);
	}
	
	
	
	printf("%.3f %.3f\n",sum1,sum2);
	
	return 0;
}

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 = (c*d - a*f) / (b*d - a*e);
        double ans1 = (1000*((c - b*x) / a))/1000;
        double ans2 = (1000*x)/1000;
		cout << fixed << setprecision(3) << ans1 << " " << ans2 << endl;
	}
	return 0;
}

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

// http://judge.u-aizu.ac.jp/onlinejudge/description.jsp?id=0004

int gcm(int a, int b) {
	if (a < 0) a *= -1;
	if (b < 0) b *= -1;
	if (a < b) {
		int t = a;
		a = b; 
		b = t;
	}
	if (b == 0) return a;
	return gcm(b, a % b);
}

int lcm(int a, int b) {
	int g = gcm(a, b);
	return (a / g) * (b / g);
}

int main() {
	int a, b, c, d, e, f;
	while (cin >> a >> b >> c >> d >> e >> f) {
		int first = lcm(a, d);
		if (abs(a) < abs(d)) {
			a *= first;
			b *= first;
			c *= first;
		} else {
			d *= first;
			e *= first;
			f *= first;
		}
		if (a * d > 0) {
			a -= d;
			b -= e;
			c -= f;
		} else {
			a += d;
			b += e;
			c += f;
		}
		
		float y = c / b;
		float x = (f - e * y) / d;
		cout << fixed << setprecision(3) << (x == 0.0 ? abs(x) : x) << " " << fixed << setprecision(3) << (y == 0.0 ? abs(y) : y) << endl;
	}
	return 0;
}

C++: #include<iostream>
#include<stdio.h>
using namespace std;
int main(){
    float a,x,b,y,c,f,e,d,y2;
    while(cin>>a>>b>>c>>d>>e>>f){y2=0;y=0;
        
        y2=b*e*y;
              x=(c*e-f*b-y2*2)/(a*e-d*b);
                y=(c-(a*x))/b;
        if(x==0){x=0;}
        
        printf("%.3f %.3f",x,y);cout<<endl;}
    
    return 0;
}

C++: #include <cstdio>
#include <iostream>
using namespace std;
int main() {
  double a, b, c, d, e, f, x, y;
  while (cin >> a >> b >> c >> d >> e >> f) {
    x = (e * c - b * f) / (a * e - b * d);
    y = (a * f - d * c) / (a * e - b * d);
    if (x == 0.0) x = 0.0;
    if (y == 0.0) y = 0.0;
    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;
  cout << fixed;
  cout << setprecision(3);

  while(true){
    cin >> a >> b >> c >> d >> e >> f;
    if(c*e == b*f)
      cout << 0.000 << " ";
    else
      cout << (c*e -b*f)/(a*e - b*d) << " ";
    if(c*d == a*f)
      cout << 0.000 << " ";
    else
      cout << (c*d - a*f)/(b*d - a*e) << endl;
  }

  cout << d << " " << e << endl;
  return 0;
}

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

void func(double, int);

int main(){

	double a, b, c, d, e, f, x, y, del;
	
	cout << fixed;
  cout.precision(3);
  
	while(cin >> a){
	
		cin >> b >> c >> d >> e >> f;
		
		del = a * e - b * d;
		x = (c * e - b * f) / del;
		y = (a * f - c * d) / del;
		
		func(x, -4);
		func(y, -4);
		
	  cout << x << " " << y << endl;
	}

	return 0;
}

void func(double x, int n){
	
	x *= pow(10, -n-1);
	x = round(x);
	x *= pow(10, n+1);	

}

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 <iomanip>
using namespace std;

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

	while (1) {
		cin>>a>>b>>c>>d>>e>>f;
		if (cin.eof()) break;

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

		cout<<setprecision(3)<<setiosflags(ios::fixed)<<x<<" "<<y<<endl;
	}

	return 0;
}

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


using namespace std;
#define RENT 100000

int main(){
  int n;
  int cnt=0;

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

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

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

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

int main(){
    double a[3],b[3];
    double x=0,y=0;
    while(cin >> a[0] >> a[1] >> a[2] >> b[0] >> b[1] >> b[2]){
        x = (b[1]*a[2] - a[1]*b[2])/(a[0]*b[1] - a[1]*b[0]);
        y = (a[0]*b[2] - a[2]*b[0])/(a[0]*b[1] - a[1]*b[0]);
        cout << fixed << setprecision(4) <<  x << "\t" << y << endl;
    }
}

C++: #include <cstdio>

float a,b,c,d,e,f;
int main (){
  scanf("%f %f %f %f %f %f",&a,&b,&c,&d,&e,&f);
  float x,y;
  x=(f*b/e-c)/(d*b/e-a);
  y=(f*a/d-c)/(e*a/d-b);
  x*=1000;
  x+=0.5;
  x=int(x+.5-(x<0)); 
  x/=1000;
  
  y*=1000;
  y+=0.5;
  y=int(y+.5-(y<0)); 
  y/=1000;
  printf("%f %f",x,y);
}

C++: #include <math.h>
#include <iostream>
#include <algorithm>
#include <functional>
#include <string>

#define YES "YES"
#define NO "NO"
#define space ' '

using namespace std;

void func();

int main(void)
{
	
	func();

	return 0;
}

// using matrix	?????????????????´??????
void func()
{
	int a, b, c, d, e, f;
	double x, y;

	while (cin >> a >> b >> c >> d >> e >> f, !cin.eof()){


		if ((a*e - d*b) == 0)
		{
			cout << 0 << space << 0 << endl;
		}
		else
		{
			x = (e*c - b*f) / (a*e - d*b);
			y = (-d*c + a*f) / (a*e - d*b);

			cout << fixed;
			cout << x << space << y << endl;
			cout << dec;
		}
	}
}