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Simplifying 2(x + -1) + 9 = 2(x + -1) + 11 Reorder the terms: 2(-1 + x) + 9 = 2(x + -1) + 11 (-1 * 2 + x * 2) + 9 = 2(x + -1) + 11 (-2 + 2x) + 9 = 2(x + -1) + 11 Reorder the terms: -2 + 9 + 2x = 2(x + -1) + 11 Combine like terms: -2 + 9 = 7 7 + 2x = 2(x + -1) + 11 Reorder the terms: 7 + 2x = 2(-1 + x) + 11 7 + 2x = (-1 * 2 + x * 2) + 11 7 + 2x = (-2 + 2x) + 11 Reorder the terms: 7 + 2x = -2 + 11 + 2x Combine like terms: -2 + 11 = 9 7 + 2x = 9 + 2x Add '-2x' to each side of the equation. 7 + 2x + -2x = 9 + 2x + -2x Combine like terms: 2x + -2x = 0 7 + 0 = 9 + 2x + -2x 7 = 9 + 2x + -2x Combine like terms: 2x + -2x = 0 7 = 9 + 0 7 = 9 Solving 7 = 9 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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