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working alone, carlos can oil the lanes in a bowling alley in five hours. Jenny can oil the same lanes in nine hours. If they worked together how long would it take them?

Respuesta :

USe the same method  as in ur last question

1/5 + 1/9 = 1/x    where x is the required time

First step is to multiply through by 45x

then solve for x

Answer:

Step-by-step explanation:

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