1. x(4+5) = 9x
2. -8(1)
3. 0
4. 1
5. 3x + (-3x)
6. 3b + 5a
7. 2x + (3y + 5z)
8. 6*(xy)
9. 8*(ab)
10. 8a*1
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Answers & Comments
1. x(4+5) = 9x
2. -8(1)
3. 0
4. 1
5. 3x + (-3x)
6. 3b + 5a
7. 2x + (3y + 5z)
8. 6*(xy)
9. 8*(ab)
10. 8a*1