Which answer best explains how to solve this problem?


Mia said, “I’m thinking of a number. Divide this number by 2. Add 15 to the quotient. The answer is 24.” What is Mia’s number?



A.

Work backward

Start with 24.

Multiply by 2 and get 48.

Subtract 15 and get 33.

Mia started with the number 33.


B.

Work backward

Start with 24.

Subtract 15 and get 9.

Multiply by 2 and get 18.

Mia started with the number 18.


C.

Work backward

Start with 15.

Multiply by 2 and get 30.

Subtract 24 and get 6.

Mia started with the number 6.