Use the algebra tiles to model the equation 2x + 4 = 3x + (-1). Then complete the sentences.

To model 2x + 4, you need:

___ positive x-tiles to represent 2x

___ positive unit tiles to represent 4.

To model 3x + (-1) you'll need:

3 ___ x-tiles to represent 3x.

1 _ unit tile to represent-1.