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Simplifying 20x + -6 + -13x + 2 = 21x + -3 + -14x + 12 Reorder the terms: -6 + 2 + 20x + -13x = 21x + -3 + -14x + 12 Combine like terms: -6 + 2 = -4 -4 + 20x + -13x = 21x + -3 + -14x + 12 Combine like terms: 20x + -13x = 7x -4 + 7x = 21x + -3 + -14x + 12 Reorder the terms: -4 + 7x = -3 + 12 + 21x + -14x Combine like terms: -3 + 12 = 9 -4 + 7x = 9 + 21x + -14x Combine like terms: 21x + -14x = 7x -4 + 7x = 9 + 7x Add '-7x' to each side of the equation. -4 + 7x + -7x = 9 + 7x + -7x Combine like terms: 7x + -7x = 0 -4 + 0 = 9 + 7x + -7x -4 = 9 + 7x + -7x Combine like terms: 7x + -7x = 0 -4 = 9 + 0 -4 = 9 Solving -4 = 9 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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