Respuesta :

The answer would be C, x=29.

This is because 87 would be equivalent to the 3x, and so you can divide the 87 by 3 in order to find x
Heather

Answer: x = 29

Step-by-step explanation:

∠ABC and 87° are vertical angles, meaning they will be congruent. This means we can write and solve an equation to find the value of x. We will then isolate the variable by using the inverse operation of multiplication, which is division.

      ∠ABC = 87°

      3x° = 87°

      x = 29

C-x = 29