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Simplifying -2(6x + 9) = -12x + -18 Reorder the terms: -2(9 + 6x) = -12x + -18 (9 * -2 + 6x * -2) = -12x + -18 (-18 + -12x) = -12x + -18 Reorder the terms: -18 + -12x = -18 + -12x Add '18' to each side of the equation. -18 + 18 + -12x = -18 + 18 + -12x Combine like terms: -18 + 18 = 0 0 + -12x = -18 + 18 + -12x -12x = -18 + 18 + -12x Combine like terms: -18 + 18 = 0 -12x = 0 + -12x -12x = -12x Add '12x' to each side of the equation. -12x + 12x = -12x + 12x Combine like terms: -12x + 12x = 0 0 = -12x + 12x Combine like terms: -12x + 12x = 0 0 = 0 Solving 0 = 0 Couldn't find a variable to solve for. This equation is an identity, all real numbers are solutions.
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