9. a) Add 5a + 3b + 5c and 3a + 2b - 3c.
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Answer:
8a + 5b - 2c
Explanation:
= 5a + 3b + 5c + 3a + 2b - 3c
= 5a + 3a + 3b + 2b + 5c - 3c
= 8a + 5b - 2c
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