Question

if the measure of an angle if seven times its compliment is 10°less than three times its supplement.

Answer 1

let the angle be x
then, its complement will be 90-x
and its supplement will be 180-x

7(90-x)+10=3(180-x)
630-7x+10=540-3x
7x-3x=640-540
4x=100
x=25

measure of the angle will be 25 degrees.