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Simplifying 2x + -1(12 + -1x) = x + 7 + 2x 2x + (12 * -1 + -1x * -1) = x + 7 + 2x 2x + (-12 + 1x) = x + 7 + 2x Reorder the terms: -12 + 2x + 1x = x + 7 + 2x Combine like terms: 2x + 1x = 3x -12 + 3x = x + 7 + 2x Reorder the terms: -12 + 3x = 7 + x + 2x Combine like terms: x + 2x = 3x -12 + 3x = 7 + 3x Add '-3x' to each side of the equation. -12 + 3x + -3x = 7 + 3x + -3x Combine like terms: 3x + -3x = 0 -12 + 0 = 7 + 3x + -3x -12 = 7 + 3x + -3x Combine like terms: 3x + -3x = 0 -12 = 7 + 0 -12 = 7 Solving -12 = 7 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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