Use substitution to solve the linear system of equations.

x = 4
-y = 1/2x

A) 4, 2
B) -2, 4
C) 2, -4
D) 4, -2

Alarge cheese pizza costs $18. each topping you add on costs $1.50. how much would it cost to get a large cheese pizza with cc toppings added? write your answer as an expression