Define a variable and write an equation for each situation. solve each equation to answer the question.

a plumber finished three jobs on tuesday. the first two only cost the owner $45 trip fee because they took very little time to complete. for the third job, the plumber charged the trip fee plus 6 times his hourly rate. if the plumber received a total of $303 for the day, what is the hourly rate?

h = hourly rate

for my equation i made,
5(45)+6h=303

but cant figure out how to solve it

(9th grade alg 1)
plz work out the problem, thnx : -)