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Simplifying -12(x + -12) + -51x = -9(1 + 7x) Reorder the terms: -12(-12 + x) + -51x = -9(1 + 7x) (-12 * -12 + x * -12) + -51x = -9(1 + 7x) (144 + -12x) + -51x = -9(1 + 7x) Combine like terms: -12x + -51x = -63x 144 + -63x = -9(1 + 7x) 144 + -63x = (1 * -9 + 7x * -9) 144 + -63x = (-9 + -63x) Add '63x' to each side of the equation. 144 + -63x + 63x = -9 + -63x + 63x Combine like terms: -63x + 63x = 0 144 + 0 = -9 + -63x + 63x 144 = -9 + -63x + 63x Combine like terms: -63x + 63x = 0 144 = -9 + 0 144 = -9 Solving 144 = -9 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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