Question

How do you simplify `(2n + 5) - (3n + 7) + (4n - 9)`?

Answer 1

`=color(blue)( 3n -11`

Explanation:

`2n + 5 - 3n - 7 + 4n - 9`

Grouping like terms
`color(red)(2n - 3n + 4n) +color(blue)( 5 - 7 - 9)`

`=color(blue)( 3n -11`