Respuesta :

5naka

(a)

in any triangle, the sum of all value of angle is 180, from the problem we get

(x-5) + (3x+30) + 35 = 180

4x + 60 = 180

x = 30

(b)

value of angle A = x-5 = 30-5 = 25

value of angle B = 3x+30 = 3(30)+30 = 120