Question

done.

Answer 1

x is the price of a candy bar and y is price of box of cookies.
One tuesday Joe bought 2 candy bars and 1 box of cookies for $9
On Saturday Joe bought 3 candy bars and 4 boxes of cookies for $26

Answer 2

do you know how to solve it?

Answer 3

not really

Answer 4

you need to eliminate one of the varables.
2x+y=9 the way to do that is to
3x+4y=26 change one so when you add them it = 0

-4(2x+y=9) notice if I mult the top one by -4

-8x - 4y = -36 it will change to this
3x+ 4y = 26 now add them straigt down
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Answer 5

do you know what to do next?