Question 311567
x=3y+15
x+y=180
(3y+15)+y=180
3y+15+y=180
4y=180-15
4y=165
y=165/4
41.25 degrees for the smaller angle.
x=3*41.25+15
x=138.75 ans. for the larger angle.
Proof:
41.25+138.75=180
180=180