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27 November, 22:03

A plumber charges $75 for a house call plus $45

per hour. How many hours did the plumber work if he

charged $210?

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Answers (1)
  1. 27 November, 22:15
    0
    210=45x+75

    -75. - 75

    135=45x

    /45. / 45

    3=x

    The plumber worked 3 hours
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