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Simplifying 4(3x + -9) = 12(x + -9) Reorder the terms: 4(-9 + 3x) = 12(x + -9) (-9 * 4 + 3x * 4) = 12(x + -9) (-36 + 12x) = 12(x + -9) Reorder the terms: -36 + 12x = 12(-9 + x) -36 + 12x = (-9 * 12 + x * 12) -36 + 12x = (-108 + 12x) Add '-12x' to each side of the equation. -36 + 12x + -12x = -108 + 12x + -12x Combine like terms: 12x + -12x = 0 -36 + 0 = -108 + 12x + -12x -36 = -108 + 12x + -12x Combine like terms: 12x + -12x = 0 -36 = -108 + 0 -36 = -108 Solving -36 = -108 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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