Question

I'm doing easy math but i don't remember learning this so heres the question.

Answer 1

Total measure is 180

x is 2nd and y is 3rd angle
2nd is 4 times 3rd angle
x=4y

total is 180

20+x+y=180
x=4y
20+4y+y=180
20+5y=180
minus 20 both sides
5y=160
divide by 5
y=32

third angle is 32 degrees