one angle is three times its supplement increased by 12

Question

 I need help with the problem.

 

Answer 1

Let a = measurement of the angle.

Then its supplement measures 180-a.

 

"one angle is three times its supplement increased by 12" means

a = 3[(180-a) + 12].

Note that I have used square brackets around the entire quantity that is multiplied by 3.

 

You can solve this equation for a.