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Simplifying 23x + -9 + -15x + 2 = 20x + -5 + -12x + 12 Reorder the terms: -9 + 2 + 23x + -15x = 20x + -5 + -12x + 12 Combine like terms: -9 + 2 = -7 -7 + 23x + -15x = 20x + -5 + -12x + 12 Combine like terms: 23x + -15x = 8x -7 + 8x = 20x + -5 + -12x + 12 Reorder the terms: -7 + 8x = -5 + 12 + 20x + -12x Combine like terms: -5 + 12 = 7 -7 + 8x = 7 + 20x + -12x Combine like terms: 20x + -12x = 8x -7 + 8x = 7 + 8x Add '-8x' to each side of the equation. -7 + 8x + -8x = 7 + 8x + -8x Combine like terms: 8x + -8x = 0 -7 + 0 = 7 + 8x + -8x -7 = 7 + 8x + -8x Combine like terms: 8x + -8x = 0 -7 = 7 + 0 -7 = 7 Solving -7 = 7 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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