Triangle word problems

Question

How to find the measure of each angle in a triangle A (10x-20) to the 0 . B (x+15) to the 0. C (x+5) to the 0

Answer 1

(10x - 20) + (x+15) +(x+5) = 180 because there are 180 degrees in a triangle

12x = 180

x = 15

Angle A = 10(15) - 20 = 130 degrees

Angle B = 15 + 15 = 30 degrees

Angle C = 15 + 5 = 20 degrees