# Labor Costs A plumber and his assistant work together toreplace the pipes in an old house. The plumber charges $45 anhour for his own labor and$25 an hour for his assistant’slabor. The plumber works twice as long as his assistant on thisjob, and the labor charge on the final bill is $4025. How longdid the plumber and his assistant work on this job? Question Labor Costs A plumber and his assistant work together to replace the pipes in an old house. The plumber charges$45 an
hour for his own labor and $25 an hour for his assistant’s labor. The plumber works twice as long as his assistant on this job, and the labor charge on the final bill is$4025. How long
did the plumber and his assistant work on this job?