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