Answer:
if my brain cell works, then (24x + 160) in
Step-by-step explanation:
20(3x + 8) - 12 x 3x = 24x + 160
p = 1/8
-3p + 1/8 = -1/4
-3p = -1/8 -14 /*8
-24p = -1 -2
-24p = -3 /:(-24)
a. 0
b. -300
c. -450