Question 852350
set x is the angle.
180 - x = supplement
90 - x = complement
(180 - x) = 10 + 5(90 - x)
180 - x = 10 + 450 - 5x
180 - x = 460 -5x
add 5x to each side
180 + 4x = 460
add -180 to each side
 4x = 280
divide each side by 4
 x = 70