# Math

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Higgins Rental charges \$ 18 an hour to rent a power tool in addition to a \$9 flat service fee. If Joseph rents a power tool and is charged \$ 423, how many hours did he rent the tool?
Hint: Convert the above scenario into an equation of the form A x + B = C.

I need help to get to the right direction of this problem to get the right answer

• Math -

423 - 9 = 414

414/18 = 23

• Math -

But the formula doesnt work because its gotta b in ax+b=c equation

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