#include <iostream>

#include <cmath>

using namespace std;

bool isSame(double x, double y){

return abs(x - y) < 1e-8;

}

int solve(double a1, double b1, double c1,

double a2, double b2, double c2, double& x, double& y){

double d = a1*b2 - a2*b1;

double dx = c1*b2 - c2*b1;

double dy = c1*a2 - c2*a1;

if (isSame(d, 0.0)){

if (isSame(dx, 0.0) && isSame(dy, 0.0)){

return 2;

} else

return 0;

} else{

x = dx / d;

y = -dy / d;

return 1;

}

}

int main(){

cout.precision(3);

cout.setf(ios::fixed);

int k, i;

double a1, b1, c1, a2, b2, c2, x, y;

cout<<"k = ";

cin>> k;

for (i=0; i<k; i++){

cin>> a1>> b1>> c1>> a2>> b2>> c2;

int result = solve(a1, b1, c1, a2, b2, c2, x, y);

switch(result){

case 0:

cout<<"Phuong trinh vo nghiem"<<endl;

break;

case 1:

cout<<"Phuong trinh co nghiem x = "<<x<<" va y = "<<y<<endl;

break;

case 2:

cout<<"Phuong trinh vo so nghiem"<<endl;

break;

}

}

system("pause");

return 0;

}