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Simplifying -3(4x + 7) = 4(-3x + -9) Reorder the terms: -3(7 + 4x) = 4(-3x + -9) (7 * -3 + 4x * -3) = 4(-3x + -9) (-21 + -12x) = 4(-3x + -9) Reorder the terms: -21 + -12x = 4(-9 + -3x) -21 + -12x = (-9 * 4 + -3x * 4) -21 + -12x = (-36 + -12x) Add '12x' to each side of the equation. -21 + -12x + 12x = -36 + -12x + 12x Combine like terms: -12x + 12x = 0 -21 + 0 = -36 + -12x + 12x -21 = -36 + -12x + 12x Combine like terms: -12x + 12x = 0 -21 = -36 + 0 -21 = -36 Solving -21 = -36 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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