Question

For pi day, Jill sells 3 apple pies and 1 lemon for &21. Jack sells 2 apple pies and 3 lemon pies for $28. What was the price of one apple pie

Answer 1

I'm guessing but not sure, wouldn't it be 7

Answer 2

A= Apple Pies
L= Lemon Pies

3A + 1L = 21
2A + 3 L = 28

Try to get one variable to the negative version of the other. Like this

(-3)3A + (-3)L = (-3)21
2A + 3L = 28

So now, it is:

-9A - 3L = -63
2A + 3L = 28

Combine Terms.

-7A = -35

A = 5


Therefore, One Apple Pie costs $5, and one Lemon Pie costs $6