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Simplifying -4x + -4(1 + -2x) = 7 + 4x -4x + (1 * -4 + -2x * -4) = 7 + 4x -4x + (-4 + 8x) = 7 + 4x Reorder the terms: -4 + -4x + 8x = 7 + 4x Combine like terms: -4x + 8x = 4x -4 + 4x = 7 + 4x Add '-4x' to each side of the equation. -4 + 4x + -4x = 7 + 4x + -4x Combine like terms: 4x + -4x = 0 -4 + 0 = 7 + 4x + -4x -4 = 7 + 4x + -4x Combine like terms: 4x + -4x = 0 -4 = 7 + 0 -4 = 7 Solving -4 = 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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