13 please I have no idea what the steps for this is

Question

asked Apr 7, 2020 190k views

1 Answer

Anthony Giorgio · Answer 1 · 2020-04-14T01:46:17+0000

Answer:

UV=142

Explanation:

21x-13=10x+31

+13 +13

21x=10x+44

-10x=-10x

11x=44

÷11 ÷11

x=4

now substitute 4 in place of x (only have to solve one)

21(4)-13= 71

now multiply your answer by 2

71×2=142