SOLUTION: Tom can do a job in 4 hours, Joy can do the same job in 3 hours, How many hours will it take the two of them to do the job if they work together

Algebra ->  Expressions-with-variables -> SOLUTION: Tom can do a job in 4 hours, Joy can do the same job in 3 hours, How many hours will it take the two of them to do the job if they work together       Log On


   



Question 297269: Tom can do a job in 4 hours, Joy can do the same job in 3 hours, How many hours will it take the two of them to do the job if they work together
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
Add their rates of working to get their
rate working together
Tom's rate: (1 job)/(4 hrs)
Joy's rate: (1 job)/(3 hrs)
1%2F4+%2B+1%2F3+=+1%2Fx
Multiply both sides by 12x
3x+%2B+4x+=+12
7x+=+12
x+=+12%2F7 hrs