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Simplifying 4a + -1(4 + -1a) = 5a 4a + (4 * -1 + -1a * -1) = 5a 4a + (-4 + 1a) = 5a Reorder the terms: -4 + 4a + 1a = 5a Combine like terms: 4a + 1a = 5a -4 + 5a = 5a Add '-5a' to each side of the equation. -4 + 5a + -5a = 5a + -5a Combine like terms: 5a + -5a = 0 -4 + 0 = 5a + -5a -4 = 5a + -5a Combine like terms: 5a + -5a = 0 -4 = 0 Solving -4 = 0 Couldn't find a variable to solve for. This equation is invalid, the left and right sides are not equal, therefore there is no solution.
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