x + 5 + 4x + 10 = 90 (complimmentary angle equals 90 degree
we can now solve for x
5x + 15 = 90
subtract 15 from both-side of the equation
5x = 90 -15
5x =75
Divide both-side of the equation by 5
x= 15
x + 5 = 15 + 5 = 20°
4x + 10 = 4(15) + 10 = 60 + 10 = 70°