Question

Y'all I'm crying...help ​

Answer 1

Below in bold.

Explanation:

C1 = 180 - C2

= 180 - (170-2x)

= 10 + 2x

So B3 = 10+2x (alternate angles).

and B2 = 90 - B3

= 90 - (10 + 2x)

= 80 - 2x.