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Simplifying 2(2x + -7) = 5x + -21 + -1x Reorder the terms: 2(-7 + 2x) = 5x + -21 + -1x (-7 * 2 + 2x * 2) = 5x + -21 + -1x (-14 + 4x) = 5x + -21 + -1x Reorder the terms: -14 + 4x = -21 + 5x + -1x Combine like terms: 5x + -1x = 4x -14 + 4x = -21 + 4x Add '-4x' to each side of the equation. -14 + 4x + -4x = -21 + 4x + -4x Combine like terms: 4x + -4x = 0 -14 + 0 = -21 + 4x + -4x -14 = -21 + 4x + -4x Combine like terms: 4x + -4x = 0 -14 = -21 + 0 -14 = -21 Solving -14 = -21 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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