12a+5b-3c, 6c-5a+8b, -8b+5c-7a
algebraic expressions class 8​

$8

step-by-step explanation:

it is pretty much backwards.

you take the 4x2 multiply that, and that is = $8

if you're trying to figure out how much each ounce cost it would be 0.20

cents each ounce

cross multiplying, we get :

⇒ (3) × (5) = (9) × (x)

⇒ 15 = 9x