# Math

posted by
**Raymond**
.

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