CPM Homework Help : CC2MN Problem 3-63

Nathan wants you to solve this puzzle: “I am thinking of a number. If you divide my number by $\mathit{3}$ and add $\mathit{-3}$ , you will get $\mathit{4}$ . What is my number?” Show all of your work.

Hint 1:

Work backwards to get Nathan's number.

Hint 2:

Start with the end number, which is $4$ .

Hint 3:

Now instead of adding $-3$ , subtract $-3$ .You should now have $7$ .

More Help:

Instead of dividing $7$ by $3$ , multiply it by $3$ to get Nathan's number.