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