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29 July, 19:01

A China cup and saucer cost 12$. The cup on its own cost 3$ more than the saucer. Form an eqaution for s and solve it. Find the cost of the cup

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  1. 29 July, 20:25
    0
    If the cup = S + 3

    and the

    saucer = S

    then

    (S + 3) + S = 12

    2s + 3 = 12

    2s = 9

    s = 4.50

    So by itself the saucer costs $4.50. To find the cost of the cup look to the beginning of the problem where we learned that

    Cup = S + 3

    cup = 4.50 + 3

    cup = 7.50

    So the saucer is $4.50 and the cup is $7.50 ...

    4.50 + 7.50 = $12.00

    It checks!
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