Melissa went to lunch with two friends. She purchased 3 corn dogs, 2 fruit cups, and
3 drinks for $15. One of her friends bought 1 corn dog, 2 fruit cups, and a drink for
$9. Her other friend spent $12 on 3 corn dogs and 2 drinks. Write a system of linear
equations that can be used to find c, the cost per corn dog, f, the cost per fruit cup,
and d, the cost per drink.

exa:

)

3+11

14

step-by-step explanation:

from this example, we can see that subtracting with integers is the same as adding the opposite. we can solve using a number line or by using the saying "keep, change, change" to us solve. it is important to remember that we can subtract a negative and end up with a larger number than we started with.

step-by-step explanation:

the true ones are a b and d