SOLUTION: A plumber made 600 dollars for working on a certain job. His apprentice who makes 3 dollars per hour less also made 600 dollars, but he worked 10hours more than the plumber. How mu

Question 1032239: A plumber made 600 dollars for working on a certain job. His apprentice who makes 3 dollars per hour less also made 600 dollars, but he worked 10hours more than the plumber. How much did the plumber make per hr?
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
Let = the plumber's charge/hr
Let = time in hours the plumber worked
-------------------
Plumber's equation:
(1)
Apprentice's equation:
(2)
---------------------------
Substitute (1) into (2)
(2)
Multiply both sides by
(2)
(2)
(2)
(2)
I note that
(2)

and
(1)
(1)
(1)
The plumber made $15/hr
( this must be on some other planet! )
------------------------
check:
(2)
(2)
(2)
(2)
OK
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