Respuesta :

Answer:

Hello! X should equal 17 and each measured angle would be at 37 degrees.

Step-by-step explanation:

(x + 20) = (4x - 31)

Solve.

x = 17

Plug it in.

(17 + 20) = (4(17) - 31)

Solve.

37 = 37

Hope this helps! Xx