Solve the simultaneous equations (a) 2x + 5y = 16 (1) 5x - 2y = 11 (2) (1) X 5 gives x + (2) X 2 gives 10x - 4y= 22 (4) (3) - (4) gives y = Substitute y = 2x + 5 X X = x = ..y in (1) .. = 16 y = (3)​