Answer:
x=13
Step-by-step explanation:
8x-20=4x+32
start by moving the terms,
8x-4x=32+20
combine
4x=52
divide each side by 4
42
$1.55870968
24.16dollars/15.5gallons = 1.55870968dollars/gallon
yes i believe you didnt mess it up. goodluck mate