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Simplifying x + 2(x + -7) = 3x + 9 Reorder the terms: x + 2(-7 + x) = 3x + 9 x + (-7 * 2 + x * 2) = 3x + 9 x + (-14 + 2x) = 3x + 9 Reorder the terms: -14 + x + 2x = 3x + 9 Combine like terms: x + 2x = 3x -14 + 3x = 3x + 9 Reorder the terms: -14 + 3x = 9 + 3x Add '-3x' to each side of the equation. -14 + 3x + -3x = 9 + 3x + -3x Combine like terms: 3x + -3x = 0 -14 + 0 = 9 + 3x + -3x -14 = 9 + 3x + -3x Combine like terms: 3x + -3x = 0 -14 = 9 + 0 -14 = 9 Solving -14 = 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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