0
Anonymous
6a + (7b - 4a - 8b) = (6a - 4a) + (7b - 8b) = 2a - b
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11a+7b-(3b-2a)
It is 20a - 5b - 9.
6a+7b. This cannot be simplified anymore unless you know a or b.
-58
7b + 16 = 5b + 247b - 5b = 24 - 162b = 8b = 4