Asap answer pl!, John can do a piece of work in 6 days. When he and Marsha work together, it takes only 4 days. How long will it take Marsha to do the work if she works alone? asap answer pl

12 days

Step-by-step explanation:

Let the amount of work be x.

John:

6 days = x

1 day = x

Together:

4 days = x

1 day = x

Marsha:

1 day = x - x

        = x - x

        = x

        = x

Marsha can do of the work in 1 day.

No. of days taken (Marsha) = x ÷ x

                                             = 12

a and c

step-by-step explanation: