Go: package main

import (
        "fmt"
        "bufio"
        "os"
        "math"
)

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
                if x == 0.0 {
                        x = math.Abs(x)
                }
                if y == 0.0 {
                        y = math.Abs(y)
                }
                fmt.Printf("%.3f %.3f\n", x, y)
        }
}

C++: #include <stdio.h>

int main()
{
	double a,b,c,d,e,f;
	while(scanf("%lf %lf %lf %lf %lf %lf",&a,&b,&c,&d,&e,&f) != EOF)
	{
		double det = a*e-b*d;
		printf("%0.3f %0.3f\n",(c*e-f*b)/det,(a*f-d*c)/det);
	}
	return 0;
}

C++: #include<iostream>
#include<cstdio>
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-f*b)/(a*e-d*b);
        y=(c*d-f*a)/(b*d-e*a);
        if(x>-0.001 && x<0.001)x=0;
        if(y>-0.001 && y<0.001)y=0;
      printf("%1.3f %1.3f\n" ,x,y);
   }
    return 0;
}

C++: #include <cstdio>
#include <iostream>
#include <iomanip>
#include <string>   
using namespace std;
 
int main(){
	double a,b,c,d,e,f,aa,bb,cc,i = 0,x,y;
	cin >> a >> b >> c >> d >> e >> f;
	aa = a;
	bb = b;
	cc = c;
	a = a * d;
	b = b * d;
	c = c * d;

	d = d * aa;
	e = e * aa;
	f = f * aa;

	y = (c - f) / (b - e);
	x = cc - (bb * y);
	x = x / aa;
    cout << fixed << setprecision(3) << x << " " << fixed << setprecision(3) << y << endl;
}

C++: // 解二元一次方程组 
#include<iostream>
#include<iomanip>
using namespace std;

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

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

using namespace std;

double delta(double o, double p, double q , double r, double s, double t) {

	//cout << "o=" << o << "s=" << s << "v=" << "r=" << "o*s-p*r=" << (o*s-p*r)  << endl;

	// |o  p ||x|   |q|
	// |r  s ||y| = |t|

	return (o*s-p*r);//a???o b???p c???q d???r e???s f???t
}

double deltacfbe(double o, double p, double q , double r, double s, double t) {

	//cout << "o=" << o<< "s=" << s << "p=" << "r=" << "q*s-p*t=" << q*s-p*t  << endl;

	// x = |q  p | /delta
	//     |t  s | 

	return (q*s-p*t);
}

double deltaadcf(double o, double p, double q , double r, double s, double t) {

	//cout << "o=" << o<< "s=" << s << "p=" << "r=" << "o*t-q*r=" << o*t-q*r  << endl;

	// y = |o  q | /delta
	//     |r  t | 

	return (o*t-q*r);
}

int main() {

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

	cout << setprecision(3) << (deltacfbe(a,b,c,d,e,f)/delta(a,b,c,d,e,f))  << " " << (deltaadcf(a,b,c,d,e,f)/delta(a,b,c,d,e,f)) << endl;
	
	}

	return 0;
}

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

int main(){
	double aa, bb, cc, a, b, c, d, e, f, x, y;				//®1:ax + by = c, ®2:dx + ey = f
	int xx, yy;
	
	while(cin >>a >>b >>c >>d >>e >>f){						//EOFªüÍ³êéÜÅ[v
		aa = a; bb = b; cc = c;								//üÍ³ê½a, b, cÌlðÛ
		
		b /= a; c /= a; a /= a;								//®1F¼ÓðaÅé
		e /= d; f /= d; d /= d;								//®2F¼ÓðdÅé
		
		b -= e; c -= f;										//®1©ç®2ðø­, ÊÍ®1ÌÏÖ
		
		y = c / b;											//15sÚÌÊ©çyðvZ
		x = (cc - (bb * y)) / aa;							//®1ÉyðãüµxðvZ
		
		if(x < 0){xx = (int)x * 1000 - 0.5; x = xx; x /= 1000;}
		else xx = (int)x * 1000 + 0.5; x = xx; x /= 1000;		//xð¬_ælÊÅlÌÜü(1000{¨0.5ð«·¨int^ÉµÄ¬_ØÌÄ¨double^É¼µÄ1/1000{)
		if(y < 0){yy = (int)y * 1000 - 0.5; y = yy; y /= 1000;}		//yð¯ã
		else yy = (int)y * 1000 + 0.5; y = yy; y /= 1000;
		
		printf("%.3f %.3f\n", x, y);						//x, yðoÍ(printf)
	}
	
	return 0;
}

C++: #include<stdio.h>

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

int main(){
  int a = 0,b = 0,c = 0,d = 0,e = 0,f = 0;

  while(fscanf(stdin,"%d %d %d %d %d %d",&a,&b,&c,&d,&e,&f) != 0){
    int pa = a,pb = b,pc = c,pd = d,pe = e,pf = 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 < 0.0005f){
    ansX = 0.0f;
  }
  if(ansY < 0.0005f){
    ansY = 0.0f;
  }

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

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-y*b)/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;

   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);


    }

C++: #include <stdio.h>
#pragma warning(disable : 4996)
long double a, b, c, d, e, f, x, y;
int main() {
	while (~scanf("%Lf%Lf%Lf%Lf%Lf%Lf", &a, &b, &c, &d, &e, &f)) {
		x = (c * e - b * f) / (a * e - b * d);
		y = (a * f - c * d) / (a * e - b * d);
		if (-0.0005 < x && x < 0.0005) x = 0.0;
		if (-0.0005 < y && y < 0.0005) y = 0.0;
		printf("%.3Lf %.3Lf\n", x, y);
	}
	return 0;
}

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

int main(){
	int a,b,c,d,e,f;
	while(cin >> a >> b >> c >> d >> e >> f){
		double x = round(((c*e-b*f)/(a*e-b*d))*1000)/1000;
		double y = round(((c*d-a*f)/(b*d-a*e))*1000)/1000;
		printf("%.3f %.3f", x, y);
	}
}

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

using namespace std;

static vector<double> solve_simultaneous(const vector<double> &set) {
	vector<double> result(2, 0);
	result.at(0) = ( (set.at(2) * set.at(4) - set.at(1) * set.at(5))
		/ (set.at(0) * set.at(4) - set.at(1) * set.at(3)) );
	result.at(1) = ( (set.at(2) * set.at(3) - set.at(0) * set.at(5))
		/ (set.at(1) * set.at(3) - set.at(0) * set.at(4)) );

	if (result.at(0) == 0) {
		result.at(0) = 0;
	}
	if (result.at(1) == 0) {
		result.at(1) = 0;
	}

	return result;
}

int main(void) {
	int dataset_counter = 0;
	double check_input = 0;
	vector<vector<double> > input;

	while (cin >> check_input) {
		input.push_back(vector<double>(6));
		input.at(dataset_counter).at(0) = check_input;
		for (int i = 1; i < 6; i ++) {
			double temp;
			cin >> input.at(dataset_counter).at(i);
		}

		dataset_counter ++;
	}

	for (vector<double> dataset : input) {
		vector<double> result(2, 0);
		result = solve_simultaneous(dataset);

		cout << fixed;
		cout << setprecision(3) << result.at(0) << " "
		<< setprecision(3) << result.at(1) << 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 tx,ty;

			tx = (1.0*(c*e - b*f) / (e*a - b*d));
			ty = (1.0*(d*c - a*f) / (b*d - a*e));

			if(tx>=0){
			tx+=0.0004;
		}
		else{
			tx-=0.0004;
		}
		if(ty>=0){
		   ty+=0.0004;
		}
		else{
			ty-=0.0004;
		}

			cout<<setprecision(3) << setiosflags(ios::fixed)<< tx<<" "<<ty<<endl;
		}
	

		
		return 0;
	}

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

int main()
{
	double a, b, c, d, e, f;
	while (std::cin >> a >> b >> c >> d >> e >> f) {
		double const denominator = a * e - b * d;
		std::cout.setf(std::ios::fixed);
		std::cout.precision(3);
		std::cout << std::showpoint
				  << (c * e - b * f) / denominator << ' '
				  << (a * f - c * d) / denominator << std::endl;
	}
	return 0;
}