Answer:
Step-by-step explanation:
The sum of interior angles of a triangle is 180°
so
180 = 2x + 40 + 3x - 80 + 5x - 60
180 - 40 + 80 + 60 = 2x + 3x + 5x
280 = 10x
x = 280 : 10
x = 28
