Ahmad has *z* erasers. Bobby has three times as many erasers as Ahmad but 7 erasers fewer than Jason.

- How many erasers do they have altogether? (Express your answer in terms of
*z*). - If
*z*= 13, how many erasers do the three boys have altogether?

3 m

- How many erasers do they have altogether? (Express your answer in terms of
*z*). - If
*z*= 13, how many erasers do the three boys have altogether?

(3 m)

- How many erasers do they have altogether? (Express your answer in terms of
*z*). - If
*z*= 13, how many erasers do the three boys have altogether?

(3 m)

- How many erasers do they have altogether? (Express your answer in terms of
*z*). - If
*z*= 13, how many erasers do the three boys have altogether?