Question

find the measure of an angle is 7 times its complement is 10 degree less than 3 times its supplement.

Answer 1

let the measurement of the angle be x

its complement is 90-x
its supplement is 180-x

7(90-x) = 3(180-x) - 10

solve for x
Angle = 20
Complement = 70
Supplement = 160

Answer 2

7(90-x)=3(180-x)-10
x=25