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Answer:

One 8x10 photo costs $1.50.

Step-by-step explanation:

You can write two equations and use a system of equations.

Let w = price of 1 wallet-size photo.

Let n = price of 1 of 8x10 photo.

Basic package:

24w + n = 19.5

Deluxe package:

32w + 3n = 28.5

We have a system of equations:

24w + n = 19.5

32w + 3n = 28.5

Multiply both sides of the first equation by -3.

Rewrite the second equation below it and add the equations.

    -72w - 3w = -58.5

(+)   32w + 3n = 28.5

---------------------------------

      -40w        = -30

w = -30 / -40

w = 0.75

24w + n = 19.5

24(0.75) + n = 19.5

18 + n = 19.5

n = 1.5

Answer: One 8x10 photo costs $1.50.

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