SOLUTION: The worker on machine A can complete a certain job in 6 hours. The worker on machine B can do the same job in 4 hours. In a rush situation, how long would it take both machinists t

Question 159472: The worker on machine A can complete a certain job in 6 hours. The worker on machine B can do the same job in 4 hours. In a rush situation, how long would it take both machinists to complete the job?
Answer by josmiceli(19441) (Show Source): You can put this solution on YOUR website!
In words:
(rate on A machine) + (rate on B machine) = rate on A & B machines together
Or, what is the sme thing,
(1 job / 6 hrs) + (1 job / 4 hrs) = 1 job / x hrs

Multiply both sides by

hrs
check answer:

Multiply both sides by

OK

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