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