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Simplifying 4x + -9x + -12 = -5x + 7 + -12 Reorder the terms: -12 + 4x + -9x = -5x + 7 + -12 Combine like terms: 4x + -9x = -5x -12 + -5x = -5x + 7 + -12 Reorder the terms: -12 + -5x = 7 + -12 + -5x Combine like terms: 7 + -12 = -5 -12 + -5x = -5 + -5x Add '5x' to each side of the equation. -12 + -5x + 5x = -5 + -5x + 5x Combine like terms: -5x + 5x = 0 -12 + 0 = -5 + -5x + 5x -12 = -5 + -5x + 5x Combine like terms: -5x + 5x = 0 -12 = -5 + 0 -12 = -5 Solving -12 = -5 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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