Answer: cheese pizzas = 25 , Pepperoni pizzas = 15
Explanation:
Let x = Number of cheese pizzas, y = Number of pepperoni pizzas.
As per given,

Multiply 7 on both sides of (i), we get

Eliminate (iii) from (ii), we get

Put value of y in (i) ,

Hence, cheese pizzas = 25 , Pepperoni pizzas = 15