lolohart lolohart

10-02-2020
Mathematics

contestada

A plumber charges $75 for a house call plus $45
per hour. How many hours did the plumber work if he
charged $210?

Respuesta :

izzy8125 izzy8125

10-02-2020

210=45x+75
-75. -75

135=45x
/45. /45
3=x
The plumber worked 3 hours

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