Question

Last week, Nikola bought 5 pizzas and 5 cakes for a total of $70.

Today, Nikola bought 5 pizzas and 10 cakes for a total of $120.
Assuming neither item has changed in price, what is the cost of a pizza in dollars?

Answer 1

Pizza = $4

Cakes = $10

Explanation:

You need to create 2 equations from the information to find the 2 missing variables.

P=pizza

C=cake

5P+10C=120

5P+5C=70

Next subtract the equations

5C=50

Solver for C

C=10

Next input C into one of the equations and solve for P

5P+5(10)=70

5P+50=70

5P=20

P=4