Question

How do you simplify `12m + 9 - 2m - 16`?

Answer 1

10m-7

Explanation:

Apples with apples, oranges with oranges.
Here the apples are `m` and the oranges are the "numbers".
Group the `m` together and the numbers together
`12m+9-2m-16=12m -2m +9 -16`
then perform calculation:
`=10m-7`