You bought 12 one-gallon bottles of apple and orange juice for a school dance. the apple juice was on sale for $1.00 per one-gallon bottle. the orange juice was $1.75 per one-gallon bottle. you spend $15.00. how many bottles of each type of juice did you buy?

For this case we first define variables:

x: bottles of apple juice

y: bottles of orange juice

We write the system of equations:

x + y = 12

1x + 1.75y = 15

Solving the system of equations we have:

x = 8

y = 4

Answer:

you did buy:

8 bottles of apple juice

4 bottles of orange juice