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5 March, 16:25

All tubes of watercolor paint at an art supply store have the the same price. An artist has a coupon for $0.50 off each tube of paint she buys. She buys 6 tubes of paint and pays a total of $84.30 after the coupon is applied. Write and solve an equation to find r, the regular price of each tube of paint. Expalin each step of your solution.

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  1. 5 March, 16:47
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    Let us assume the regular price of each tube of paint = r.

    0.50 off each tube.

    New price of each tube = r - 0.50.

    She buy 6 tubes.

    Total price of 6 tubes = 6 * (r-0.50).

    We are given total price = $84.30.

    Therefore, we can setup an equation

    6 * (r-0.50) = 84.30.

    Distributing 6 over (r-0.50), we get

    6r - 3.0 = 84.30

    Adding 3.0 on both sides, we get

    6r - 3.0+3.0 = 84.30+3.0

    6r = 87.30

    Dividing both sides by 6, we get

    6r/6 = 87.30/6

    r = 14.55

    Therefore, required equation is 6 (r-0.50) = 84.30 and the regular price of each tube of paint is $14.55.
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