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Simplifying 3(x + -1) = 7x + -7 + -4x Reorder the terms: 3(-1 + x) = 7x + -7 + -4x (-1 * 3 + x * 3) = 7x + -7 + -4x (-3 + 3x) = 7x + -7 + -4x Reorder the terms: -3 + 3x = -7 + 7x + -4x Combine like terms: 7x + -4x = 3x -3 + 3x = -7 + 3x Add '-3x' to each side of the equation. -3 + 3x + -3x = -7 + 3x + -3x Combine like terms: 3x + -3x = 0 -3 + 0 = -7 + 3x + -3x -3 = -7 + 3x + -3x Combine like terms: 3x + -3x = 0 -3 = -7 + 0 -3 = -7 Solving -3 = -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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