Question

There were some pizzas in the library. 13 pizzas were eaten by zombies. There are now 20 pizzas in the library. Which equation can be used to find p, the number of pizzas that were in the library? ​

Answer 1

p=13+20? or addition

Step-by-step explanation:its inverse operation i think that's what its called so use addition

Answer 2

p - 13 = 20

Explanation:

p - 13 = 20

add 13 on both sides

p = 33

there were 33 pizzas in the library.