Which equation is written in standard form? a. x + 2y = 12 b. x + 1 = y c. 3y – 2x = 10 d. y = 4x + 5

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?

Will mark brainliest! ( explain the answer too, it can be one sentence)

Pleas its really urgent and i would really appreciate it! what is the value of x? enter your answer in the box. x =