2a
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-2a plus 3b
4a + 3c - 2b - c + a - b = 5a - 3b + 2c
Gathering like terms together, this is equal to 5a + 3b + 7c.
(5a - 4b) + (2c - 3b - 6c) + a =5a - 4b + 2c - 3b - 6c + a =(5a + a) + (-4b - 3b) + (2c - 6c) =[ 6a - 7b - 4c ].
8a+2b