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Simplifying -3x + 5x + -7 = 2(x + -1) + -21 Reorder the terms: -7 + -3x + 5x = 2(x + -1) + -21 Combine like terms: -3x + 5x = 2x -7 + 2x = 2(x + -1) + -21 Reorder the terms: -7 + 2x = 2(-1 + x) + -21 -7 + 2x = (-1 * 2 + x * 2) + -21 -7 + 2x = (-2 + 2x) + -21 Reorder the terms: -7 + 2x = -2 + -21 + 2x Combine like terms: -2 + -21 = -23 -7 + 2x = -23 + 2x Add '-2x' to each side of the equation. -7 + 2x + -2x = -23 + 2x + -2x Combine like terms: 2x + -2x = 0 -7 + 0 = -23 + 2x + -2x -7 = -23 + 2x + -2x Combine like terms: 2x + -2x = 0 -7 = -23 + 0 -7 = -23 Solving -7 = -23 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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