Algebra 2 Summer Homework!?

Hi!

You have to think of the number of 20-cent stamps as X and the number of 32-cent stamps as Y.

However, if she bought an equal number of stamps, then you know that y=x.

So:

20x + 32y = 520

insert y=x:

20x + 32 x = 520

then solve for x:

52x = 520

x =10

and if you want to verify to make sure:

10*0.20 + 10*0.32

=2+3.2=$5.20

good luck!

Let a be the number of $0.20 stamps.

Then a is also the number of $0.32 stamps.

Then:

20a + 32a = 520

(20 + 32)a = 520

52a = 520

Divide by 52:

a = 10.

She bought 10 of each.

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