SOLUTION: A welder requires 24 h to do a job. After the welder and an apprentice work on the job for 12 h, the welder quits. The apprentice finishes the job in 15 h. How long would it take t

Question 1028976: A welder requires 24 h to do a job. After the welder and an apprentice work on the job for 12 h, the welder quits. The apprentice finishes the job in 15 h. How long would it take the apprentice, working alone, to do the job?
Answer by josgarithmetic(39620) (Show Source): You can put this solution on YOUR website!
List of the work rates:

welder                   

apprentice               

welder + apprentice

The example is a uniform work rates problem, like RT=J, using J for amount of job.
Put the description into an equation.

That is enough help unless you need help with the algebra. Solve for x.
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Yes, you want more help on solving the equation...

You should be able to identify the simplest common denominator being 24x. You can begin by MULTIPLYING the left and right members by 24x.

-------------No!

The steps above contain a mistake, not yet found. After working again on paper, the result found is , and this checks as correct when substituted in the original equation.
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