Question

Determine all three angle measurements in Triangle XYZ that has angles that measure (2x - 15), (x - 5)º and 42º.

Answer 1

the sum of triangle is 180°

(2x-15)+(x-5)+42°=180°

2x+x-15°-5°+42°=180°

3x+22°=180°

3x=180°-22

3x=158°

x=52.67°