Question

7 - Calcule o valor de x:
da figura


(A) 21
(B) 19°
(C) 17°
(D) 15°​

Answer 1

$4x - 34 = 180 - 138 \\ 4x - 34 = 42 \\4x = 42 + 34 \\ 4x = 76 \\ x = \frac{76}{4} \\ x = 19$

B) 19°