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 <vector>
#include <string>
#include <sstream>
#include <iomanip>
#include <cmath>

using namespace std;

void inputData(vector<string>& data_set) {
	string buffer;
	while(getline(std::cin,buffer))
		data_set.push_back(buffer);
}

vector<string> splitString(const string& str, const string& separator = " ") {
	vector<string> ret;

	std::size_t bp, ep;
	bp = ep = 0;
	while((ep = str.find_first_of(separator, bp)) != string::npos){
		if(bp != ep){
			ret.push_back(string(str.begin() + bp, str.begin() + ep));
		}
		bp = ep + 1;
	}

	if(bp <= str.size() - 1){
		ret.push_back(string(str.begin() + bp, str.end()));
	}

	return ret;
}

template <class T>
T convertStringToNumber(const string& str) {
	stringstream ss;
	T ret;

	ss << str;
	ss >> ret;

	return ret;
}



vector<int> parseStringData(const string& data_str) {
	auto buff = splitString(data_str);

	vector<int> ret(buff.size());
	for(int i = 0; i < buff.size(); ++i){
		auto temp = convertStringToNumber<int>(buff[i]);
		ret[i] = temp;
	}

	return ret;
}


void displayAnswer(const vector<int>& data_set) {
	double det = 1.0 / (data_set[0] * data_set[4] - data_set[1] * data_set[3]); 
	double x = det * (data_set[4] * data_set[2] + -data_set[1] * data_set[5]);
	double y = det * (-data_set[3] * data_set[2] + data_set[0] * data_set[5]);

	x = round(x * 1000) / 1000.0;
	y = round(y * 1000) / 1000.0;

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


void doAllProcess() {
	vector<string> buffer;
	inputData(buffer);

	for(int i = 0; i < buffer.size(); ++i){
		auto data_set = parseStringData(buffer[i]);
		displayAnswer(data_set);
	}
}


int main() {
	doAllProcess();

	return 0;
}

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

using namespace std;

void solve(int a, int b, int c, int d, int e, int f) {
	double x = (f - (double)e*c/b) / (d - (double)e*a/b);
	double y = (c - a*x) / b;
	if (x == 0) x = 0.000;
	if (y == 0) y = 0.000;
	printf("%4.3f %4.3f\n", x, y);
}

int main() {
	int a, b, c, d, e, f;
	while (cin >> a >> b >> c >> d >> e >> f) {
		solve(a,b,c,d,e,f);
	}
	return 0;
}

C++: #include <iostream>
#include <stdio.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 = (c*e - b*f) / (a*e - b*d);
	y = (c*d - a*f) / (b*d - a*e);

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

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

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

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

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

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

  m = a;
  n = d; 

  a *= n;
  b *= n;
  c *= n;

  d *= m;
  e *= m;
  f *= m;
  
  y = (double)((c-f)/(b-e));

  x = (double)((c-b*y)/a);

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

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

  return 0;
}

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

float marume(float x, float N){
	x = x*pow(10,N);
	x = int(x+0.5-(x<0));
	return x/pow(10,N);
}

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

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)!=-1){double x,y; y=(double)(a*f-d*c)/(a*e-b*d);x=(double)(c-b*y)/a;printf("%.3f %.3f\n",x+0.0005,y+0.0005);}return 0;}

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

double shisyagonyu(double x){
  x += 0.0005;
  return x;
}

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

  while(std::cin >>a>>b>>c>>d>>e>>f){
    x = shisyagonyu((c*e-b*f)/(a*e-b*d));
    y = shisyagonyu((a*f-c*d)/(a*e-b*d));

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

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

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

C++: #include<iostream>
#include<cstdio>
#include<iomanip>
#include<vector>
using namespace std;
class SimultaneousEquation{ 
    public:
        void solve(int a,int b,int c,int d,int e,int f){ 
            double x,y;
            x=double(a*e-b*d)/(c*e-b*f);
            y=double(c*d-a*f)/(b*d-a*e);
            printf("%.3lf %.3lf\n",x,y);
            }
};
int main(){ 
    int a,b,c,d,e,f;
    while(scanf("%d%d%d%d%d%d",&a,&b,&c,&d,&e,&f)){
        SimultaneousEquation inst;
        inst.solve(a,b,c,d,e,f);
    }
}

C++: #include<iostream>
#include<string>
#include<cmath>
#include<queue>
#include<vector>
#include<functional>
#include<algorithm>
#include<cstdio>
using namespace std;
int main() {
	long double a, b, c, d, e, f;
	while (cin >> a >> b >> c >> d >> e >> f) {
		c *= (d / a);
		b *= (d / a);
		a *= (d / a);
		long double ansx=0, ansy=0;
		if (f - c != 0) {
			ansy = (f - c) / (e - b);
		}
		if (a != 0) {
			ansx = (c - ansy*b) / a;
		}
		ansx *= 1000;
		ansx = round(ansx);
		ansx /= 1000;
		ansy *= 1000;
		ansy = round(ansy);
		ansy /= 1000;
		if (ansx == 0) ansx = 0;
		if (ansy == 0) ansy = 0;
		printf("%.3LF %.3LF\n", ansx, ansy);
	}
}

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", round(x * 1000) / 1000, round(y * 1000) / 1000);
  }
  return 0;
}

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

int main(){
    double a[100]={0};
    double b[100]={0};
    double c[100]={0};
    double d[100]={0};
    double e[100]={0};
    double f[100]={0};
    int i=0;
    while(cin>>a[i]>>b[i]>>c[i]>>d[i]>>e[i]>>f[i]){
        i++;
        }
    for(int j=0;j<i;j++){
        float x=(b[j]*f[j]-e[j]*c[j])/(b[j]*d[j]-a[j]*e[j]);
        float y=(a[j]*f[j]-c[j]*d[j])/(a[j]*e[j]-b[j]*d[j]);
        cout<<setiosflags(ios::fixed)<<setprecision(3)<<x<<" "<<y<<endl;
        }
    
    return 0;
}

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

using namespace std;

#define Vi vector<int>
#define FOR(i,s,e) for (int i=s; i<e; i++)
#define ITER(v) v.begin(), v.end()

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

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

    while (true) {
        cin >> a >> b >> c >> d >> e >> f;
        if (cin.eof()) { break; }
        den =  a * e - b * d;
        x = static_cast<double>(c * e - b * f) / den;
        y = static_cast<double>(- c * d + a * f) / den;
        // avoid -0.000
        x += 0.0
        y += 0.0
        cout << fixed << setprecision(3) << x << " " << y << endl;
    }

    return 0;
}