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