Explanation: 1- getting the value of x: We are given that: side AB is congruent to side DF. This means that: AB = DF 3(2x+10) = 12x + 12 6x + 30 = 12x + 12 12x - 6x = 30 - 12 6x = 18 x = 18/6 x = 3
2- getting the value of y: We are given that: side BC is congruent to side FG. This means that: BC = FG 2y + 12 = 2(2y-3) 2y + 12 = 4y - 6 4y - 2y = 12 + 6 2y = 18 y = 18/2 y = 9
