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11 November, 10:36

Eight times a number is the same as 90 decreased the number. find the number.

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  1. 11 November, 10:41
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    8n=90-n

    first get the n to one side ...

    8n^2=90

    then divide

    n^2=11.25

    (i feel like theres one more step but im unsure)
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