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25 March, 20:22

Janet is painting her shed. She buys some gallon-sized paint cans that cost $15 each and 2 quart-sized paint cans that cost $4 each. The cost of Janet's total purchase is $53. Write and solve an equation to determine the number of gallons of paint that Janet purchased.

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  1. 25 March, 20:23
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    1 gallon cost $15

    1 quarts cost $4

    1 quarts = 1/4 gallon

    15x for number of gallon cans

    2 cans at $4 each = $8

    15x + 8 = 53

    Subtract 8 from both sides:

    15x = 53-8

    15x = 45

    Divide both sides by 15:

    x = 45/15

    x = 3

    She bought 3 gallon cans of paint

    Plus she bought 2 quart cans, which is equal to a half gallon.

    She bought a total of 3.5 gallons of paint.
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