40° and 50°
complementary angles sum to 90°
let x be the angle then it's complement is x + 10
sum = x + x + 10 = 90
2x + 10 = 90
subtract 10 from both sides
2x = 90 - 10 = 80
divide both sides by 2
x = [tex]\frac{80}{2}[/tex] = 40
thus the angle is 40° and it's complement is 40 + 10 = 50°