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Simplifying 2 + x + -1(5 + -2x) + -7 = 3x + -7 2 + x + (5 * -1 + -2x * -1) + -7 = 3x + -7 2 + x + (-5 + 2x) + -7 = 3x + -7 Reorder the terms: 2 + -5 + -7 + x + 2x = 3x + -7 Combine like terms: 2 + -5 = -3 -3 + -7 + x + 2x = 3x + -7 Combine like terms: -3 + -7 = -10 -10 + x + 2x = 3x + -7 Combine like terms: x + 2x = 3x -10 + 3x = 3x + -7 Reorder the terms: -10 + 3x = -7 + 3x Add '-3x' to each side of the equation. -10 + 3x + -3x = -7 + 3x + -3x Combine like terms: 3x + -3x = 0 -10 + 0 = -7 + 3x + -3x -10 = -7 + 3x + -3x Combine like terms: 3x + -3x = 0 -10 = -7 + 0 -10 = -7 Solving -10 = -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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