Question

Hello, I need help understanding how to do this problem.

Answer 1

Answer: 26

Step-by-step explanation:so it takes 2 of 3x-1 to equal the whole thing 8x-20

2(3x-1)=8x-20

6x-2=8x-20

-6x. -6x

-2= 2x-20

+20=. +20

18= 2x

Divide by 2

9=X

BC= 3(9)-1=26