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 <iomanip>
using namespace std;

int main(){
	double a[6];
	double x,y;
	while(true){
		cin >> a[0];
		cin >> a[1];
		cin >> a[2];
		cin >> a[3];
		cin >> a[4];
		cin >> a[5];
		if(cin.eof())
			break;
			
		x = (a[4]*a[2]-a[1]*a[5])/(a[0]*a[4]-a[1]*a[3]);
		y = (-a[3]*a[2]+a[0]*a[5])/(a[0]*a[4]-a[1]*a[3]);
		
		cout << x << ".000 " << y <<".000" << endl;
	}
	return 0;
}

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

C++: #include <iostream>
#include <cstdio>
using namespace std;
int main(void){
	
	double x, y;
	int a, b, p;
	int c, d, q;

	while (cin >> a >> b >> p >> c >> d >> q){

		x = (double)(p * d - b * q) / (a * d - b * c);
		y = (double)(a * q - p * c) / (a * d - b * c);
		printf("%.3f %.3f\n", x, y);
	}
}

C++: #include<stdio.h>
#include<math.h>
int main(void){
    double a,b,c,d,e,f,A,x,y,X,Y,Z;

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

    Y=b-e,Z=c-f;
    y=Z/Y;
    x=(c-b*y)/a;

    /*x=x+0.0005,y=y+0.0005;
    x=x*1000,y=y*1000;
    x=floor(x);
    y=floor(y);
    x=x/1000,y=y/1000;*/
    if(1e-10>fabs(x))x=0;
    if(1e-10>fabs(y))y=0;
   printf("%.3lf %.3lf\n",x,y);
    }
   //printf("\na%lf\nb%lf\nc%lf\nd%lf\ne%lf\nf%lf\n%lf\n%lf",a,b,c,d,e,f,Y,Z);

    return 0;
}

C++: #include<iostream>
//#include<algorithm>
//#include<cmath>
//#include<string>
//#include<cctype>
//#include <vector>
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);
		printf("%.3f %.3f\n", (1000*((c - b*x) / a))/1000, (1000*x)/1000);
	}
	return 0;
}

C++: #define _CRT_SECURE_NO_WARNINGS

#include <stdio.h>
#include <string.h>
#include <stdlib.h>

int main(void) {
	char string[54];
	double a, b, c, d, e, f, x, y;
	scanf("%[^\r\n]",string);
	
	a = atof(strtok(string, " "));
	b = atof(strtok(NULL, " "));
	c = atof(strtok(NULL, " "));
	d = atof(strtok(NULL, " "));
	e = atof(strtok(NULL, " "));
	f = atof(strtok(NULL, " "));

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

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

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

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

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

		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;
}

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

using namespace std;

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

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

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

			double diff = 0.5;

			x<0?(diff=-0.5):(diff=0.5);
			x = (int)(x*1000+diff);
			
			y<0?(diff=-0.5):(diff=0.5); 
			y = (int)(y*1000+diff); 
			

			x /= 1000;y/=1000;
			

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

C++: #include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef vector<int> vi;
typedef vector<ll> vl;
typedef complex<double> P;
typedef pair<int,int> pii;
#define REP(i,n) for(ll i=0;i<n;++i)
#define REPR(i,n) for(ll i=1;i<n;++i)
#define FOR(i,a,b) for(ll i=a;i<b;++i)

#define DEBUG(x) cout<<#x<<": "<<x<<endl
#define DEBUG_VEC(v) cout<<#v<<":";REP(i,v.size())cout<<" "<<v[i];cout<<endl
#define ALL(a) (a).begin(),(a).end()

#define MOD (ll)(1e9+7)
#define ADD(a,b) a=((a)+(b))%MOD
#define FIX(a) ((a)%MOD+MOD)%MOD

int main(){
  double a,b,c,d,e,f;
  while(~scanf("%lf%lf%lf%lf%lf%lf",&a,&b,&c,&d,&e,&f)){
    // ax+by=c
    // dx+ey=f
    double x,y;
    x = (b*f-c*e)/(b*d-a*e);
    y = (f-d*x)/e;
    if(abs(x)<1e-9) x = abs(x);
    x = round(x*1000.0)/1000.0;
    y = round(y*1000.0)/1000.0;
    printf("%.3lf %.3lf\n",x,y);
  }
  return 0;
}

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

using namespace std;
int main(){
    float a,b,c,d,e,f;
    while((cin>>a>>b>>c>>d>>e>>f)){
        float x = (c*e-b*f)/(a*e-b*d);
        float y = (c*d-a*f)/(b*d-a*e);
        x = round(1000*x) / 1000;
        y = round(1000*y) / 1000;
        if(x==0){
            x = 0;
        }
        if(y==0){
            y = 0;
        }
        printf("%.3f %.3f",x,y);
    }
    return 0;
}

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

int main(){

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

	while(1){
		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 << x << " " << y << endl;
	}

	return 0;
}

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

int main() {
    clock_t cTimeStart, cTimeEnd;
    cTimeStart = clock();           // 現在時刻
    float a,b,c,d,e,f ;
    float x,y;
    while(cin>>a>>b>>c>>d>>e>>f){
    	x=(f*b-e*c)/(b*d-e*a);
       	y=(f*a-d*c)/(e*a-b*d);
       	if(x>-0.001&&x<=0)x=0.0;
       	if(y>-0.001&&y<=0)y=0.0;

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

    cTimeEnd = clock();           // 現在時刻
//    cout<< "処理時間:" <<(cTimeEnd - cTimeStart)/1000 << "[ms]" << endl;

	return 0;
}

C++: #include <stdio.h>
#include <math.h>
int main(){
 double a,b,c,d,e,f,y[10000],x[10000];
 int i=0,n;
while(scanf("%lf%lf%lf%lf%lf%lf",&a,&b,&c,&d,&e,&f) != EOF){
  y[i]=((c*d)-(a*f))/((b*d)-(a*e));
  x[i]=((c*e)-(b*f))/((a*e)-(b*d));
  i++;
}
  n=i;
  for(i=0;i < n; i++){
    x[i]=fabs(x[i]);
    y[i]=fabs(y[i]);
  printf("%.3lf %.3lf\n", x[i],y[i]);
  }
  return 0;
}

C++: #include<iostream>
#include<algorithm>
#include<stdio.h>
using namespace std;
int main(){
	int a,b,c,d,e,f;
	int o,p,q,r,s,t;
	float x,y;
	while(scanf("%d%d%d%d%d%d",&a,&b,&c,&d,&e,&f)!=EOF){
		o=a;p=b;q=c;r=d;s=e;t=f;
		o*=d;p*=d;q*=d;
		r*=a;s*=a;t*=a;
		//printf("%d %d %d %d %d %d \n",o,p,q,r,s,t);
		p-=s;
		q-=t;
		y=(float)(q/p);
		int g=(int)(e*y);
		g*=-1;
		x=(float)((f+g)/d);
		printf("%.3f %.3f",x,y);
	}
}

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

int main()
{
	//ax + by = c
	//dx + ey = f

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

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

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

int main()
{
	double a,b,c,d,e,f;
	double x,y;
	int count = 0;
	vector<double> result_x,result_y;

	while(cin >> a >> b >> c >> d >> e >> f) {
		y = (a * f - c * d) / (a * e - b * d);
		x = (c - b * y) / a;
		result_y.push_back(y);
		result_x.push_back(x);
		cout << result_x[count] << ' ' << result_y[count] << endl;
		count++;
	}

	return 0;
}

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

int main(){
double a,b,c,d,e,f,a_,b_,c_,d_,e_,f_;
double x,y;
double in;
while (std::cin >>a>>b>>c>>d>>e>>f){
in = (a*e - b*d);
a_ = a/in;
b_ = -1*d/in;
d = -1*b/in;
e_ = e/in;
x = c * a_ + f*b_;
y = c*d_ + f*e_;
std::cout << std::setprecision(3) << x << ' ' << std::setprecision(3) << y << std::endl;
}
    return 0;
}