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Question
Add:
2a + 6b + 8c; 16a + 13c + 18b
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Solution
(2a + 6b + 8c) + (16a + 13c + 18b)
= 2a + 6b + 8c + 16a + 13c + 18b
= (2a + 16a) + (6b + 18b) + (8c + 13c)
= 18a + 24b + 21c
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