Answer:
10
Step-by-step explanation:
5+5=10
4x + 2 + 12x + 17
= 4x + 12x + 2 + 17
= 16x + 19
for the first one set 3y+y=180 and y+x=180
the second one set w+y=180, 42+x=180, y+20=180, and 87+v