college algebra word problem

Question

Two angles are supplementary. The measure of one angle is 42° more than twice the measure of the other angle. Find the measure of each angle. (Enter your answers as a comma-separated list. Use the degree symbol, °, after each angle measure.)

Answer 1

A = 42 + 2B

A+B = 180

A = 180-B

180-B = 42+2B

3B = 138

B = 138/3 = 46 degrees

A = 180-46 = 134 degrees

(46, 136) put a little tiny o after & above each to indicate degree