CPM Homework Help : AC Problem 12-55

Ms. Speedi’s favorite recipe for fruit punch requires $12\%$ apple juice. How much pure apple juice should she add to $2$ gallons of punch that has $8\%$ apple juice to meet her standards?

Hint 1:

$x$ is the number of gallons.

Hint 2:

Draw a visual representation of the mixture as shown below.

Step:

$2\left(0.08\right)+x\left(1.00\right)=\left(2+x\right)\left(0.12\right)$