Answer:
w = -10.5
Step-by-step explanation:
p = 21 +2w
get 2w by its self
p= 21 + 2x
-21 -21
p - 21 = 2w
cancel out p
p(0) - 21 = 2w
-21 = 2w
divide both sides by 2
w= -10.5
Hope this helps!!!
