Question

Write an expression that is equivalent to 3(2n+3)+9

Answer 1

Another expression could be 6n+9+9

Answer 2

One expression you can do, is to simply simplify the expression,

We can deistribute the 3
6n+9+9

You can then simplify further:
6n+18

Once we have the simplified expression, you can then expnd it in different ways for example:
3(2n+6)

Hope these helped!