Go: package main

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

var sc = bufio.NewScanner(os.Stdin)

func read() string {
	sc.Scan()
	return sc.Text()
}

func main() {
	sc.Split(bufio.ScanLines)
	for sc.Scan() {
		s := strings.Split(sc.Text(), " ")
		a, _ := strconv.ParseFloat(s[0], 64)
		b, _ := strconv.ParseFloat(s[1], 64)
		c, _ := strconv.ParseFloat(s[2], 64)
		d, _ := strconv.ParseFloat(s[3], 64)
		e, _ := strconv.ParseFloat(s[4], 64)
		f, _ := strconv.ParseFloat(s[5], 64)
		x := ((b * f) - (c * e)) / ((b * d) - (a * e))
		y := ((a * f) - (c * d)) / ((a * e) - (b * d))
		if x == 0 {
			fmt.Printf("0.000 %.3f\n", y)
		} else if y == 0 {
			fmt.Printf("%.3f 0.000\n", x)
		} else {
			fmt.Printf("%.3f %.3f\n", x, y)
		}
	}
}

C++: #define _CRT_SECURE_NO_WARNINGS
#include <queue>
#include <set>
#include <map>
#include <list>
#include <stack>
#include <cmath>
#include <functional>
#include <ctype.h>
#include <ctime>
#include <cstdio>
#include <vector>
#include <string>
#include <bitset>
#include <cctype>
#include <cstdlib>
#include <cstring>
#include <utility>
#include <numeric>
#include <complex>
#include <sstream>
#include <fstream>
#include <iomanip>
#include <cassert>
#include <iterator>
#include <algorithm>
#include <iostream>

#define aLL(g) (g).begin(),(g).end()
#define REP(i, x, n) for(int i = x; i < n; i++)
#define rep(i,n) REP(i,0,n)
#define F(i,j,k) fill(i[0],i[0]+j*j,k)
#define P(p) cout<<(p)<<endl;
#define EXISt(s,e) ((s).find(e)!=(s).end())
#define INF 1<<25
#define MAX 100000000
#define PI 3.14159265258979
#define pb push_back
#define mp make_pair
using namespace std;
typedef vector<int> vi;
typedef vector<long long> vl;
typedef vector<double> vd;
typedef pair<int, int> pii;
typedef pair<long, long> pll;
typedef long long ll;
int dx[] = { 0, 1, 0, -1 };
int dy[] = { -1, 0, 1, 0 };

int sttoi(std::string str) {
	int ret;
	std::stringstream ss; ss << str;
	ss >> ret;
	return ret;
}

int gcd(int a, int b){
	if (b > a)swap(a, b);
	if (b == 0)return a;
	return gcd(b, a%b);
}

void solve() {
	int a, b, c, d, e, f;
	double x, y;
	while (scanf("%d %d %d %d %d %d",&a,&b,&c,&d,&e,&f) != -1){
	y = (double)(d*c - a*f) / (double)(b*d - a*e);
	x = (double)(c - b*y) / (double)a;
	x *= 1000;
	y *= 1000;
	x = round(x);
	y = round(y);
	x /= 1000;
	y /= 1000;
	cout << setprecision(3) << fixed << x << " " << y << endl;
	}
}

int main() {
	solve();
	return 0;
}

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

int main(){

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

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

		alpha =  1.0 / (a*e-b*d);
		x = alpha*(e*c-b*f);
		y = alpha*(a*f-d*c);

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

	}

	return 0;

}

C++: #include <iostream>
#include <iomanip>
#include <cmath>
using namespace std;
int main() {
    cin.tie(0);
    ios::sync_with_stdio(false);
    int a, b, c, d, e, f;
    while (cin >> a >> b >> c >> d >> e >> f) {
        double x = double(e * c - b * f) / (e * a - b * d);
        double y = double(c - a * x) / b;
        cout << fixed << setprecision(3) << x << " " << y << "\n";
    }
}

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

#define COL 3 //列
#define LINE 2 //行

//連立方程式1つとxyの答えを持つ
typedef struct{
	double data[LINE][COL];
	double x_answer;
	double y_answer;
} Question;


int main(){
	Question q[10];
	int q_num = 0;//問題数
	int i,j,k = 0;
	int d;

	//入力の最後まで処理
	while( cin >> d ){
		for(i=0; i<LINE; i++){
			for(j=0; j<COL; j++){
				scanf("%lf",&q[q_num].data[i][j]);
			}
		}
		
		q_num++;
	}

	//問題を解く処理
	for(i=0; i<q_num; i++){
		//前進消去
		//(2)' = (2)-(1)*a10/a00
		for(j=COL-1; j>=0; j--){
			q[i].data[1][j] -= q[i].data[0][j] * q[i].data[1][0] / q[i].data[0][0];
		}
		
		q[i].y_answer =  q[i].data[1][2] / q[i].data[1][1] ;

		q[i].x_answer =  (q[i].data[0][2] - q[i].data[0][1] * q[i].y_answer) / q[i].data[0][0] ;

	}

	for(k=0; k<q_num; k++){
		printf("%.3lf %.3lf\n",q[k].x_answer,q[k].y_answer);
	}


	return 0;
}

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

C++: #include <cstdio>
#include <cstdlib>
#include <cmath>
#include <climits>
#include <cfloat>
#include <map>
#include <utility>
#include <set>
#include <iostream>
#include <memory>
#include <string>
#include <vector>
#include <algorithm>
#include <functional>
#include <sstream>
#include <complex>
#include <stack>
#include <queue>
using namespace std;
typedef long long ll;
typedef vector<int> vint;
typedef pair<int, int> pint;
#define MOD 1000000007 //10^9+7
#define INF 1000000000 //10^9

pair<double, double>equ2(int a,int b,int c,int d,int e,int f);

pair<double, double>equ2(int a,int b,int c,int d,int e,int f){
    double det=1.0/(a*e-b*d);
    double x=(double)(c*e-b*f)*det;
    double y=(double)(a*f-c*d)*det;
    if (x==-0) x=0;if (y==-0) y=0;
    return pair<double, double>(x,y);
}



int main ()
{
    int a,b,c,d,e,f;
    while (cin>>a>>b>>c>>d>>e>>f) {
        pair<double,double> ans=equ2(a,b,c,d,e,f);
        
        printf("%.3f %.3f\n",ans.first,ans.second);
    }
    return 0;
}

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

int main()
{
	int a, b, c,d;
	while (1)
	{
		cin >> a >> b >> c;
		if (a == -1 && b == -1 && c == -1)break;
		d = a + b; if (a == -1 || b == -1 || d < 30) {
			cout << 'F' << endl;
		}
		else {
			if (d >= 80)cout << 'A' << endl;
			if (80 > d &&d>= 65)cout << 'B' << endl;
			if (65 > d&&d >= 50)cout << 'C' << endl;
			if (50 > d &&d >= 30 && c < 50)cout << 'D' << endl;
			if (50 > d &&d >= 30 && c >= 50) { cout << 'C' << endl; }

		}
	}
	return 0;
}

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

void OutputSolution(int a, int b, int c, int d, int e, int f)
{
	int B = b;
	a *= e;
	b *= e;
	c *= e;
	d *= B;
	e *= B;
	f *= B;
	double x = (c-f) / (a-d);
	double y = (c-a*x) / b;
	cout << fixed << setprecision(3) << x << ' ' << y << endl;
}

int main()
{
	while(true){
		int a, b, c, d, e, f;
		cin >> a >> b >> c >> d >> e >> f;
		if(cin.eof()) break;
		OutputSolution(a, b, c, d, e, f);
	}
	return 0;
}

C++: #include <iostream>
#include <string>
#include <cstring>
#include <fstream>
#include <algorithm>
#include <iomanip>
#include <vector>
#include <stack>
#include <queue>
#include <deque>
#include <map>
#include <list>
#include <set>
#include <cstdio>
#include <cstdlib>
#include <cmath>
#include <bitset>
#include <functional>

using namespace std;

#define FOR(i,n) 		for(int(i)=0;(i)<(int)(n);(i)++)
#define FORN(i,a,b,c) 	for(int(i)=a;i<(int)(b);i+=(c))
#define RES(x,nilai)	memset(x,nilai,sizeof(x));
#define pb              push_back
#define mp              make_pair
#define INF				1000000000

typedef long long ll;
typedef pair<int, int> ii;
typedef vector<int> vi;
typedef vector<ii> vii;

inline string IS(int a){
    char x[100];
    sprintf(x,"%d",a); string s = x;
    return s;
}

inline int SI(string a){
    char x[100]; int res;
    strcpy(x,a.c_str()); sscanf(x,"%d",&res);
    return res;
}

//==============================================

bool cmp(int x,int y) {return x>y;}

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

int main() {
	//freopen("in.txt","r",stdin);
	//freopen("13.txt","w",stdout);
	ios_base::sync_with_stdio(false); cin.tie(NULL);
	
	
    while(cin>>a>>b>>c>>d>>e>>f) {
        y = (a*f-c*d)/(a*e-d*b);
        x = (c-b*y)/a;
		cout << fixed << setprecision(3) << x << ' ' << y << endl;
    }
	
    return 0;
}

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

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