Question

The cost C(in dollars) of making n watches is represented by c=15n + 85. How many watches are made when the cost is $385?

Answer 1

Answer: 20

Solution: Subtract 85 from the cost then divide the remainder by 15

Answer 2

20

Explanation:

385=15n+85

-85 -85

300=15n

/15 /15

20=n