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Simplifying 23x + -9 + -13x + 2 = 21x + -6 + -11x + 15 Reorder the terms: -9 + 2 + 23x + -13x = 21x + -6 + -11x + 15 Combine like terms: -9 + 2 = -7 -7 + 23x + -13x = 21x + -6 + -11x + 15 Combine like terms: 23x + -13x = 10x -7 + 10x = 21x + -6 + -11x + 15 Reorder the terms: -7 + 10x = -6 + 15 + 21x + -11x Combine like terms: -6 + 15 = 9 -7 + 10x = 9 + 21x + -11x Combine like terms: 21x + -11x = 10x -7 + 10x = 9 + 10x Add '-10x' to each side of the equation. -7 + 10x + -10x = 9 + 10x + -10x Combine like terms: 10x + -10x = 0 -7 + 0 = 9 + 10x + -10x -7 = 9 + 10x + -10x Combine like terms: 10x + -10x = 0 -7 = 9 + 0 -7 = 9 Solving -7 = 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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