SOLUTION: Machine X can do a certain job in four hours and machine Y can do the same job in six hours if machines X, Y, and Z do the job in two hours working together, how long would it take

Algebra ->  Expressions-with-variables -> SOLUTION: Machine X can do a certain job in four hours and machine Y can do the same job in six hours if machines X, Y, and Z do the job in two hours working together, how long would it take      Log On


   

Question 1129774: Machine X can do a certain job in four hours and machine Y can do the same job in six hours if machines X, Y, and Z do the job in two hours working together, how long would it take Z to do the job alone?
Answer by josgarithmetic(39625) About Me  (Show Source):
You can put this solution on YOUR website!
z, time for machine Z to do one job working alone, in hours


1%2F4%2B1%2F6%2B1%2Fz=1%2F2--------solve this for z.

.

.

1%2Fz=1%2F12

highlight%28z=12%29