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21 May, 20:09

The plumber charges $50 for the first visit plus $8 per hour of work. if the plumbers total bill is $290 how many hours did he work

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  1. 21 May, 20:16
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    H is the variable I used for hours worked

    290 = (8*h) + 50 (known 50 dollar fee plus 8$ / hr)

    subtract 50 from both sides

    240 = 8h

    divide both sides by 8

    h=30

    He worked 30 hours.
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