Answer:
x = 5, AB = 29, BC = 22
Step-by-step explanation:
4x + 9 + 5x + 2 = 56
9x + 11 = 56
9x = 45
x = 5
Substitute the 5 in for x's
4(5) + 9
20 + 9
29 = AB
5(5) + 2
20 + 2
22 = BC
