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Simplifying -1 + 5(x + -4) = 12x + 2 + -7x Reorder the terms: -1 + 5(-4 + x) = 12x + 2 + -7x -1 + (-4 * 5 + x * 5) = 12x + 2 + -7x -1 + (-20 + 5x) = 12x + 2 + -7x Combine like terms: -1 + -20 = -21 -21 + 5x = 12x + 2 + -7x Reorder the terms: -21 + 5x = 2 + 12x + -7x Combine like terms: 12x + -7x = 5x -21 + 5x = 2 + 5x Add '-5x' to each side of the equation. -21 + 5x + -5x = 2 + 5x + -5x Combine like terms: 5x + -5x = 0 -21 + 0 = 2 + 5x + -5x -21 = 2 + 5x + -5x Combine like terms: 5x + -5x = 0 -21 = 2 + 0 -21 = 2 Solving -21 = 2 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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