Question

Josh but a total of 30 cans of cola and root beer. There were twice as many cans of cola is cans of root beer. How many cans of color did he buy?

Answer 1

20

Explanation:

start by using system of equations

x = cola

y = root beer

x + y = 30

x = 2y

now either use substitution or elimination. for me, substitution is easier.

the second equation already has one variable isolated ( x ) so, plug that into the first equation.

2y + y = 30

y = 10

now plug your answer into the original equation.

x + 10 = 30

x = 20

hope this helps :)