Go: package main

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

func gcd(num1, num2 int) int {
	if num2 == 0 {
		return num1
	}
	num3 := num1 % num2
	return gcd(num2, num3)
}

func lcm(num1, num2 int) int {
	if num1%num2 != 0 {
		num3 := gcd(num1, num2)
		for i := 1; ; i++ {
			check := num3 * i
			if check%num1 == 0 && check%num2 == 0 {
				return check
			}
		}
	} else {
		return num1
	}
}

func main() {
	scanner := bufio.NewScanner(os.Stdin)
	for scanner.Scan() {
		strNums := strings.Fields(scanner.Text())
		nums := []int{}
		for _, strNum := range strNums {
			num, _ := strconv.Atoi(strNum)
			nums = append(nums, num)
		}
		a := nums[0]
		b := nums[1]
		c := nums[2]
		d := nums[3]
		e := nums[4]
		f := nums[5]
		lcm := lcm(a, d)
		mulA := lcm / a
		mulD := lcm / d
		a *= mulA
		b *= mulA
		c *= mulA
		d *= mulD
		e *= mulD
		f *= mulD

		if d < 0 {
			d *= -1
			e *= -1
			f *= -1
		}

		bE := b - e
		cF := c - f
		y := cF / bE
		x := (c - (y * b)) / a

		fmt.Printf("%d.000 ", x)
		fmt.Printf("%d.000\n", y)
	}
}

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

int main(){
	vector<vector<double> > mat(2, vector<double>(3));
	while(cin>>mat[0][0]>>mat[0][1]>>mat[0][2]>>mat[1][0]>>mat[1][1]>>mat[1][2]){
		if(mat[1][0]!=0) swap(mat[0], mat[1]);
		for(int i=0; i<2; i++){
			if(mat[i][0]!=0){
				for(int j=2; j>=0; j--){
					mat[i][j] /= mat[i][0];
				}
			}
		}
		if(mat[1][0]!=0){
			for(int i=0; i<3; i++){
				mat[1][i] -= mat[0][i];
			}
		}
		mat[1][2] /= mat[1][1];
		mat[0][2] -= mat[1][2]*mat[0][1];
		
		cout << fixed;
		cout << setprecision(3);
		cout << mat[0][2] << " " << mat[1][2] << endl;
	}
	return 0;
}

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

using namespace std;

int main(){
    int a,b,c,d,e,f;
    double X[6] = {};
    
    while( cin >> X[0]) {
    	for(int i=1;i<6;i++) 
    	cin >> X[i];
   
    double y = ( X[2] * X[3] - X[0] * X[5]) / ( X[1] * X[3] - X[0] * X[4] );

    if( X[0] !=0 )
    cout << fixed << setprecision(3) << (X[2] - X[1] * y) / X[0] << " " << y << "\n";
    
    else
    cout << fixed << setprecision(3) << (X[5] - X[4] * y) / X[3] << " " << y << "\n";
}
	return 0;
}

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

using namespace std;

double EPS = 1e-4;

int gcd(int a, int b) { return b != 0 ? gcd(b, a%b) : a; }

int main() {
	double a, b, c, d, e, f;
	
	while (cin >> a >> b >> c >> d >> e >> f) {
		double x, y;
		
		int div1 = gcd(a, b), div2 = gcd(b, d);
		int div = gcd(div1, div2);
		a /= div; b /= div; c /= div;
		
		div1 = gcd(d, e); div2 = gcd(e, f);
		div = gcd(div1, div2);
		d /= div; e /= div; f /= div;
		
		y = (c - a*f/d)/(b - a*e/d);
		if (fabs(y) < -EPS) y = 0.0;
		
		x = (c - b*y)/a;
		if (fabs(x) < EPS) x = 0.0;
		
		printf("%.3lf %.3lf\n", x, y);
	}
	
	return 0;
}

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

using namespace std;

class cEquation
{
public:
	string calc(vector<double> &);
};

string cEquation::calc(vector<double> &v)
{
	double a = v[0];
	double b = v[1];
	double c = v[2];
	double d = v[3];
	double e = v[4];
	double f = v[5];
	double x = (c*e - b*f) / (a*e - b*d);
	if (x == -0) x = 0;
	double y = (a*f - c*d) / (a*e - b*d);
	if (y == -0) y = 0;
	ostringstream oss;
	oss << fixed << setprecision(3) << x << " " << y;

	return string(oss.str());
}

int main()
{
	cin.tie(0);
	ios::sync_with_stdio(false);

	cEquation ct;
	vector<double> vd(6);

	for (;;)
	{
		cin >> vd[0] >> vd[1] >> vd[2] >> vd[3] >> vd[4] >> vd[5];
		if (cin.fail()) break;
		cout << ct.calc(vd) << endl;
	}

	return 0;
}

C++: #include<stdio.h>

void printFunc(int a,int b,int c,int d,int e,int f);

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

  scanf("%d %d %d %d %d %d",&a,&b,&c,&d,&e,&f);
  printFunc(a,b,c,d,e,f);
  scanf("%d %d %d %d %d %d",&a,&b,&c,&d,&e,&f);
  printFunc(a,b,c,d,e,f);

  return 0;
}

void printFunc(int a,int b,int c,int d,int e,int f){
  float ansX,ansY;
  if(b == 0 || e == 0){
    ansY = 0;
  }
  else{
    ansY = (float)(c*d - f*a)/(float)(b*d - e*a);
  }

  if(a == 0 || d == 0){
    ansX = 0;
  }
  else{
    ansX = (float)(c*e - f*b)/(float)(a*e - d*b);
  }

  if(ansX < 0.001f){
    ansX = 0.0f;
  }
  if(ansY < 0.001f){
    ansY = 0.0f;
  }

  printf("%.3f %.3f\n",ansX,ansY);
}

C++: #include <stdio.h>

int main(void){

	double a, b, c, d, e, f;
	double x, y;

	while ( scanf("%lf %lf %lf %lf %lf %lf", &a, &b, &c, &d, &e, &f) != EOF){

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

		printf("%4.3lf %4.3lf\n", x, y);
	}

	return 0;
}

C++: #include<stdio.h>
int main(){
	int a,b,c,d,e,f;
	double x,y,z,v;
	scanf("%d %d %d %d %d %d",&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);
	if(x>=-0.0005&&x<0.0005)	x=0;
	if(y>=-0.0005&&y<0.0005)	y=0;
	printf("%.3lf %.3lf\n",x,y);
}

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

int main(){
  int a, b, c, d, e, f;
  scanf("%d ",&a);
  scanf("%d ",&b);
  scanf("%d ",&c);
  scanf("%d ",&d);
  scanf("%d ",&e);
  scanf("%d ",&f);
  
  double x, y;
  x = (double)(c*e-b*f) / (double)(a*e-b*d);
  y = (double)(a*f-c*d) / (double)(a*e-b*d);
  x = (double)round(x*10000.0) / 10000.0;
  y = (double)round(y*10000.0) / 10000.0;
  printf("%f.3 %f.3\n", x, y);
  
  return 0;
}

C++: #include<bits/stdc++.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=round((c*e-b*f)/(a*e-b*d)*1000)/1000;
    y=round((c*d-a*f)/(b*d-a*e)*1000)/1000;

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

}

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

int main(){

    double a,b,c,d,e,f,y,x,bb,cc,dd,ee,ff;
    while(scanf("%lf %lf %lf %lf %lf %lf", &a, &b, &c, &d, &e, &f) != EOF){
        bb=b/a;
        cc=c/a;
        ee=e/d;
        ff=f/d;
        y=(cc-ff)/(bb-ee);
        x=(c-b*y)/a;
        x+=0.0004;
        y+=0.0004;
        printf("%.3lf %.3lf\n",x,y);
    
        /*
        y=round(1000*y);
        y=(int)y;
        y=y/1000+0.0;
        
        x=round(1000*x);
        x=(int)x;
        x=x/1000+0.0;
        cout<<fixed<<setprecision( 3 )<<x<<" "<<y<<endl;*/
        //printf("%f %f\n",x,y);
    }
    return 0;
}

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

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) / (b*d - a*e);

		printf("%.3f %.3f\n", x + 0.0, y + 0.0);
	}
	
	return 0;
}

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)){
	double y=(c*d-a*f)/(b*d-a*e);
	double x=(a*e-b*d)/(c*e-b*f);
		if(b*d-a*e==0)y=0;
		if(c*e-b*f==0)x=0;
	printf("%.3f %.3f\n",((int) x*10000%10<5)?x:x+0.001,((int)y*10000%10<5)?y:y+0.001);
	}
	return 0;
}

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


double a,b,c,d,e,f;
double A,B;//x,y座標
int main(){
  while(scanf("%lf %lf %lf %lf %lf %lf",&a,&b,&c,&d,&e,&f) !=EOF){
    
    if(a*e-b*d != 0){
    B =(c*e-f*b)/(a*e-b*d);
    A =(c -b*B)/a;
    }
    
    if(A > 0){
    A =round((A+0.0005)*1000)/1000;
    }else if(A < 0){
    A =round((A-0.0005)*1000)/1000;
    }
    if(B > 0){//小数第4位を四捨五入
    B =round((B+0.0005)*1000)/1000;
    }else if(B <0){
    B =round((B-0.0005)*1000)/1000;
    }
    printf("%.3f %.3f\n",B,A);
  }
  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 * e - b * f) / (a * e - b * d);
        double y = (a * f - c * d) / (a * e - b * d);
        x *= 1000; x = x + (x > 0 ? 0.5 : -0.5); x = (int)x;
        y *= 1000; y = y + (y > 0 ? 0.5 : -0.5); y = (int)y;
        printf("%.3f %.3f\n", x / 1000, y / 1000);
    }
    return 0;
}