#include <iostream>
#include <conio.h>
using namespace std;
 
int non_main() {
      cout << "<=EQUATION SYSTEM=>\n\nHere there are two linear equations: \n"
           << "a1*x1 + b1*x2 = c1\na2*x1 + b2*x2 = c2\n\nEnter numbers:\n";
 
      int a1, a2, b1, b2, c1, c2, d, d1, d2, x1=0, x2=0;
      cout << "a1 = "; cin >> a1;
      cout << "a2 = "; cin >> a2;
      cout << "b1 = "; cin >> b1;
      cout << "b2 = "; cin >> b2;
      cout << "c1 = "; cin >> c1;
      cout << "c2 = "; cin >> c2;
 
      cout << "\n" << a1 << "*x1 + " << b1 << "*x2 = " << c1 
           << "\n" << a2 << "*x1 + " << b2 << "*x2 = " << c2 << "\n\n";
 
      d = a1*b2 - a2*b1; 
      if (d!=0){
            d1 = c1*b2 - c2*b1; 
            d2 = a1*c2 - a2*c1;
 
            x1 = d1/d;
            x2 = d2/d;
 
            cout << "x1 = " << x1 << endl << "x2 = " << x2 << endl;
      }
      else
            cout << "No!";
 
      getch();
      return 0;
}