6,612 is the answer because all you need to do is combine them by their place value.
Subtract the amount the drum holds by what's already in the drum.
5-1.5= 3.5 gallons
Plug in
2(2) + 3(-3) + (-5)
4 + (-9) + (-5)
4 + (-14)
-10
Answer is -10
2x + 3y + z = -10
