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, b, c, d, e, f;

	while (cin >> a >> b >> c >> d >> e >> f) {
		double x = int(1000 * (e*c - b*f) / (a*e - b*d)) / 1000.0;
		double y = int(1000 * (c*d - a*f) / (b*d - a*e)) / 1000.0;

		cout << fixed;

		cout << setprecision(3) << x << " " 
		     << setprecision(3) << y << endl;
	}
	return 0;
}

C++: #include <iostream>
#include <cstdio>
using namespace std;
int main(){
  double a,b,c,d,e,f;
  double A,B,C;
  double temp;
  int cnt;
  while(scanf("%lf %lf %lf %lf %lf %lf",&a,&b,&c,&d,&e,&f) != EOF){
    A = a;
    B = b;
    C = c;
    b /= a;
    c /= a;
    a = 1;
    e /= d;
    f /= d;
    d = 1;
    b -= e;
    c -= f;
    c /= b;
    C -= c * B;
    C /= A;
    printf("%.3f %.3f\n",C,c);
  }
  return(0);
}

C++: #include <iostream>
#include <iomanip>
#include <cstdio>
#include <cmath>
#include <utility>
using namespace std;
typedef pair<double, double> PDD;
PDD calc(double mat[2][2], double vec[2]){
  double a = mat[0][0], b = mat[0][1], d = mat[1][0], e = mat[1][1];
  double c = vec[0], f = vec[1];
  double det = a * e - d * b;
  return make_pair((e * c - b * f) / det, (-c * d + a * f) / det);
}
int main(){
  double mat[2][2];
  double vec[2];
  while(cin >> mat[0][0] >> mat[0][1] >> vec[0] >> mat[1][0] >> mat[1][1] >> vec[1]){
    PDD res = calc(mat, vec);
    double x = (double)(round(res.first*1000))/1000.0, y = (double)(round(res.second*1000))/1000.0;
    printf("%.3f %.3f\n", x, y);
  }
  return 0;
}

C++: #include<iostream>


using namespace std;

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

		x=(e*c-f*b)/(e*a-b*d);
		y=(d*c-f*a)/(b*d-a*e);
		printf("%.3f %.3f\n",x,y);
//		x*=1000;
//		x=x+0.5-(a<0);
//		x=int(x);
//		x/=1000;

//		y*=1000;
//		y=y+0.5-(a<0);
//		y=int(y);
//		y/=1000;
//		x=y=a=b=c=d=e=f=0;
	}
}

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

/*
ax + by = c
dx + ey = f

x = (c-by)/a
d(c-by)/a + ey = f
dc/a - dby/a + ey = f
ey - dby/a = f - dc/a
y(e-db/a) = f - dc/a
y = (f-dc/a)/(e-db/a)

aex + bey = ce
bdx + bey = bf
aex - bdx = ce - bf
x(ae - bd) = ce - bf
x = (ce - bf)/(ae - bd)
by = c - ax
y = (c - ax)/b
*/
int main()
{
    while(true){
        double a, b, c, d, e, f;
        std::cin >> a >> b >> c >> d >> e >> f;
        if(std::cin.eof()) break;
        double x, y;
        if(b){
            x = (c*e - b*f) / (a*e - b*d);
            y = (c - a*x) / b;
        }else{
            y = (f-d*c/a)/(e-d*b/a);
            x = (c-b*y)/a;
        }
        if(x == -0) x = 0;
        if(y == -0) y = 0;
        std::cout << std::fixed << std::setprecision(3);
        std::cout << x << " " << y << std::endl;
    }
    return 0;
}

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

void deal(double &x)
{
    if (fabs(x) < 1e-6) x = 0;
}

double a, b, c, d, e, f;
void solve(double &x, double &y)
{
    if (b == 0)
    {
        x = c / a;
        y = (f - d * x) / e;
    }
    else
    {
        x = (b * f - e * c) / (b * d - e * a);
        y = (c - a * x) / b;
    }
    deal(x); // !
    deal(y); // !
}

int main()
{
    while (cin >> a >> b >> c >> d >> e >> f)
    {
        double x, y;
        solve(x, y);
        printf("%.3f %.3f\n", x, y);
    }
    return 0;
}

C++: #include <iostream>
#include <cstdio>
#include <cstdlib>
#include <cctype>
#include <cstring>
#include <sstream>
#include <string>
#include <vector>
#include <map>
#include <set>
#include <list>
#include <stack>
#include <queue>
#include <algorithm>
#include <complex>
#include <iterator>
using namespace std;

typedef pair<int, int> pii;
typedef long long ll;
typedef vector<int> vi;
typedef vector<vi> vvi;
typedef vector<string> vs;

#define all(c) (c).begin(), (c).end()
#define rall(c) (c).rbegin(), (c).rend()
#define tr(c, i) for(auto i = (c).begin(); i != (c).end(); i++)
#define rtr(c, i) for(auto i = (c).rbegin(); i != (c).rend(); i++)
#define repfn(i, a, cont, next) \
  for(auto i = (a); [=](){return(cont);}(); i = [=](){return(next);}())
#define repby(i, a, b, step) repfn(i, a, i < b, i + step)
#define repab(i, a, b) repby(i, (a), (b), 1)
#define rep(i, n) repab(i, 0, (n))
#define pb push_back
#define sz(c) int((c).size())

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

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

int main(void){
	double a,b,c,d,e,f;
	double x,y;
	cout << fixed;
	cout.precision(3);
	while(cin >> a >>b >> c >> d >> e >>f){
		y=(c*d-a*f)/(b*d-a*e); if(y==0) y=0;
		x=(c*e-b*f)/(a*e-b*d); if(x==0) x=0.0;
		cout << x << " " << y << endl;
	}
	return 0;
}

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

int main(){
  double a, b, c, d, e, f;
  while(cin >> a >> b >> c >> d >> e >>f){
    double x, y;
    x = ((b*f)/e -c)/((b*d)/e-a);
    y = ((a*f)/d -c)/((a*e)/d-b);
    if(y == -0.0) y = 0;
    if(x == -0.0) x = 0;
    cout << fixed << setprecision(3) << x << " " << y << endl;
  }
  return 0;
}

C++: #include<iostream>
#include<string.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=(double)((e*c-b*f)/(a*e-b*d));
    y=(double)((-(d*c)+a*f)/(a*e-b*d));
    if(x==0){
        x=0;
    }
    if(y==0){
        y=0;
    }
    printf("%.3f %.3f\n",x,y);
    }
}

C++: #include <iostream>
#include <algorithm>
#include <set>
#include <vector>
#include <sstream>
#include <typeinfo>

using namespace std;

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

C++: #include<iostream>
#include<iomanip>
#include<string>
#include<algorithm>
#include<functional>
#include<vector>
#include<math.h>
#define L(_i,_N) for(int _i=0;_i<_N;_i++)
#define C(_Dis) cout<<_Dis<<endl;
typedef long long int lli;
using namespace std;

int main() {
	int a, b, c, d, e, f;
	double x,y;
	while (cin >> a >> b >> c >> d >> e >> f) {
		y = (double)((a*f - c*d) / (a*e - b*d));
		x = (double)((c*e - b*f) / (a*e - b*d));
		cout << fixed << setprecision(3) << x << " " << y << endl;
	}
	return 0;
}

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

C++: #include<iostream>
#include<cstdio>
using namespace std;
#define rep(i,n) for(int i=0;i<n;i++)

int main()
{
    while(1)
    {
    double a,b,c,d,e,f;
    cin >> a;
    if(cin.eof())break;
    cin >> b;
    cin >> c;
    cin >> d;
    cin >> e;
    cin >> f;
    double det = a*e-b*d;
    printf("%1.3f %1.3f\n",(c*e-b*f)/det,(-c*d+a*f)/det);
    }
    return 0;
}

C++: #include<stdio.h>
#define N 1000000
struct{int a[6];}data[N];

int main(){
    int i,j,L;
    double a,b,c,d,e,f;
    double x,y;
    for(i=0; i<N; i++){
        for(j=0;j<6;j++)
            if(scanf("%d",&data[i].a[j])==EOF)break;
        if(j==0)break;
    }
    L=i;
    for(i=0;i<L;i++){       
        a=data[i].a[0]; b=data[i].a[1]; c=data[i].a[2]; d=data[i].a[3]; e=data[i].a[4]; f=data[i].a[5];
        x=(1/(a*e-b*d))*(e*c-b*f);
        y=(1/(a*e-b*d))*(a*f-d*c);
        printf("%4.3f %4.3f\n",x,y);
    }
    return 0;
}