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Simplifying 9n + -27 = 3(3n + -9) Reorder the terms: -27 + 9n = 3(3n + -9) Reorder the terms: -27 + 9n = 3(-9 + 3n) -27 + 9n = (-9 * 3 + 3n * 3) -27 + 9n = (-27 + 9n) Add '27' to each side of the equation. -27 + 27 + 9n = -27 + 27 + 9n Combine like terms: -27 + 27 = 0 0 + 9n = -27 + 27 + 9n 9n = -27 + 27 + 9n Combine like terms: -27 + 27 = 0 9n = 0 + 9n 9n = 9n Add '-9n' to each side of the equation. 9n + -9n = 9n + -9n Combine like terms: 9n + -9n = 0 0 = 9n + -9n Combine like terms: 9n + -9n = 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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