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