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Simplifying 2(a + -1) + -9 = 2a + 6 Reorder the terms: 2(-1 + a) + -9 = 2a + 6 (-1 * 2 + a * 2) + -9 = 2a + 6 (-2 + 2a) + -9 = 2a + 6 Reorder the terms: -2 + -9 + 2a = 2a + 6 Combine like terms: -2 + -9 = -11 -11 + 2a = 2a + 6 Reorder the terms: -11 + 2a = 6 + 2a Add '-2a' to each side of the equation. -11 + 2a + -2a = 6 + 2a + -2a Combine like terms: 2a + -2a = 0 -11 + 0 = 6 + 2a + -2a -11 = 6 + 2a + -2a Combine like terms: 2a + -2a = 0 -11 = 6 + 0 -11 = 6 Solving -11 = 6 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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