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11 July, 02:54

In a sale there is 50% off all prices. A chair costs £45 in the sale. How much was it before the sale?

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  1. 11 July, 06:02
    0
    90

    Step-by-step explanation:

    Sale price = original price * (1-discount)

    We know the sale price and the discount

    45 = original price (1-.5)

    45 = original price (.5)

    Divide each side by. 5

    45/.5 = original price

    90 = original price
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