At a certain store, the taco sauce was on sale for 1/5 off. With a coupon for an additional 40 cents off, the final cost of the sauce was $1.20.


Which equation will help Marvin to figure out how much his payment will be?

Let x = one installment

Ac - 1/5c + 40 = 120

Bc - 1/5c - 40 = 120

C1/5c = 120 - 40

D1/5c = 120 + 40