Question

Seven times the complement of an angle is 10 less than three times its suplement find the angle

Answer 1

let angle = x. it's complement = (90-x) , and supplement =(180-x) 7(90-x) =3(180-x) -10. 630-7x =540 -3x -10. 630-530 =7x -3x .100 =4x. x=25