-5a + 5
Work Step by Step
(-3a + 4) - [-7a + (9a - 1)] = Remove round brackets. -3a + 4 - [-7a + 9a - 1] = Use the distributive property: -3a + 4 + 7a - 9a + 1 = Group similar terms. (-3a + 7a - 9a) + (4 + 1) = Simplify. -5a + 5
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