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Simplifying 4a + -9 = 2a + -1 + 2a Reorder the terms: -9 + 4a = 2a + -1 + 2a Reorder the terms: -9 + 4a = -1 + 2a + 2a Combine like terms: 2a + 2a = 4a -9 + 4a = -1 + 4a Add '-4a' to each side of the equation. -9 + 4a + -4a = -1 + 4a + -4a Combine like terms: 4a + -4a = 0 -9 + 0 = -1 + 4a + -4a -9 = -1 + 4a + -4a Combine like terms: 4a + -4a = 0 -9 = -1 + 0 -9 = -1 Solving -9 = -1 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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