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Simplifying -1(-5x + 3) = 5x + 21 Reorder the terms: -1(3 + -5x) = 5x + 21 (3 * -1 + -5x * -1) = 5x + 21 (-3 + 5x) = 5x + 21 Reorder the terms: -3 + 5x = 21 + 5x Add '-5x' to each side of the equation. -3 + 5x + -5x = 21 + 5x + -5x Combine like terms: 5x + -5x = 0 -3 + 0 = 21 + 5x + -5x -3 = 21 + 5x + -5x Combine like terms: 5x + -5x = 0 -3 = 21 + 0 -3 = 21 Solving -3 = 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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