
Example: Solve, x + y = 7 and x  y = 3. Solution: Given that, x + y = 7 (I) x  y = 3 (II) Adding both equations, we get (x + y = 7) + (x  y = 3) x + y + x  y = 7 + 3 2x = 10 x = 10/2 x = 5 Substituting x value in equation (I) or (II) we get the value of y. x + y = 7 5 + y = 7 y = 7  5 y = 2 Therefore, the solution set is (5,2). Directions: Solve the following questions. Also write at least 10 examples of your own. 