Select all the expressions that are equivalent to 2/3 (18 - 21d +15c) a: 2(6 − 7d + 5c)
b: 36 + 42d - 30c
c: 36 - 42d + 30c
d: 2c - 14d - 12
e: 12 - 14d + 10c

When you answer this can you explain

Me i’m stuck on all these questions besides the two bottom ones

Arestaurant offers delivery for their pizzas. the total cost the customer pays is the price of the pizzas, plus a delivery fee. one customer pays $23 to have 2 pizzas delivered. another customer pays $59 for 6 pizzas. how many pizzas are delivered to a customer who pays $86?