Answer:
The length is 56
Step-by-step explanation:
First, since WX and ZY are the same length, set them equal to each other and solve for a:
8a-5 = 5a+16
8a = 5a + 21
3a = 21
a = 7
Now, you can plug in 7 for a in the original equation and get:
8a-5
8(7)-5
56-5
51
51 is your final answer!
