Java Exercise Nr. 22 (Selections)

A linear equation can be solved using Cramer’s rule. Write a program that prompts the user to enter a, b, c, d, e, and f and displays the result. If a*d - b*c is  0 , report that “The equation has no solution.”

Solution:

public static void main(String[] args) {
   Scanner s = new Scanner(System.in);
   double a, b, c, d, e, f;
   double x, y, condition;

   System.out.print("Enter a, b, c, d, e, f:");
   a = s.nextDouble();
   b = s.nextDouble();
   c = s.nextDouble();
   d = s.nextDouble();
   e = s.nextDouble();
   f = s.nextDouble();

   condition = a * d - b * c;

   if(condition != 0) {
x = (e * d - b * f) / condition;
y = (a * f - e * c) / condition;
System.out.print("x is " + x + " and y is " + y);
   } else {
  System.out.print("The equation has no solution.");
   }
}