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3 July, 04:17

One month, Ruby worked 8 hours more than Isaac, and Svetlana worked 4 times as many hours as Ruby. Together they worked 112 hours. Find the number of hours each person worked.

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  1. 3 July, 04:45
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    R=8+I

    S=4R

    R+I+S=112

    R+R-8+4R=112

    6R=120

    R=20

    So therefore, Ruby worked 20 hours, Svetlana worked 80 hours, and Isaac worked 12 hours.
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