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Play Matching Game
1. e-1
2. e-2
3. e-3
4. e-5
5. e-6
6. e-4
7. e-7

2x+9

3x+3-x-9

x+3+x+6

2(3x-2)+2x-1

x(3+2)-4+3

3x-3

6x+4-2(x-3)

4x-2

2x-6

-3(x-2)-(-x-4)

5x-1

2x+x-3

8x-5

2x+10