### Home > MC2 > Chapter 6 > Lesson 6.2.6 > Problem 6-124

6-124.

Group like terms so that they can be combined.

(4x + 2x + x) + (−1 + 2)

7x + 1

Visualize 8 negative *x* tiles, 4 positive unit tiles, 3 negative unit tiles, and 10 positive *x* tiles. If a negative and a positive tile of the same value make a zero, how many tiles are remaining?

Group like terms.

(−4 + 4) + 1x^{2} + 3x

Combine like terms.

0 + 1x^{2} + 3x

x^{2} + 3x

This is 2 groups of (3x − 2). Visualize what that would look like with tiles.

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