-2a + 6
Work Step by Step
(5a - 1) - [3a + (4a - 7)] = Remove round brackets. 5a - 1 - [3a + 4a - 7] = Use the distributive property: 5a - 1 - 3a - 4a + 7 = Group similar terms. (5a - 3a - 4a) + (-1 + 7) = Simplify. -2a + 6
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