write and solve an equation to find the number of ovetime hours the plumber worked

Question

A plumber charges $30 per hour and $42 for each hour of overtime. For a job the plumber works 3 regular hours x overtime hours and charges $195 for new parts. The total amount of the bill for the job is$390. Write and solve an equation to find the number of overtime hours the plumber worked. MUST BE WRITTEN AND SOLVED IN EQUATION

Answer 1

job kost=390 . . . parts =195$, so laber=390-195=195$ . . . plumber laber=30$/our, so ours=195/30=6.5 ours. . .