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Simplifying (9n + -12) = (3n) Reorder the terms: (-12 + 9n) = (3n) Remove parenthesis around (-12 + 9n) -12 + 9n = (3n) Solving -12 + 9n = (3n) Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '(-3n)' to each side of the equation. -12 + 9n + (-3n) = (3n) + (-3n) Combine like terms: 9n + (-3n) = 6n -12 + 6n = (3n) + (-3n) Combine like terms: (3n) + (-3n) = 0 -12 + 6n = 0 Add '12' to each side of the equation. -12 + 12 + 6n = 0 + 12 Combine like terms: -12 + 12 = 0 0 + 6n = 0 + 12 6n = 0 + 12 Combine like terms: 0 + 12 = 12 6n = 12 Divide each side by '6'. n = 2 Simplifying n = 2
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