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