In a parallelogram, opposite sides have the same length. 3x + 9 = 5x -5 group like terms on one side 9 + 5 = 5x -3x 14 = 2x x is 7. Since AB is 5x -5 AB = 5(7) -5 AB = 30.
BX is half of the line DB. So BX = DX 5y = 7y - 10 10 = 7y -5y 10 = 2y y =5. Since BX = 7y - 10 BX = 7(5) -10 BX = 25
