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Simplifying 3(3n + -4) = (7n + 4) + 8 Reorder the terms: 3(-4 + 3n) = (7n + 4) + 8 (-4 * 3 + 3n * 3) = (7n + 4) + 8 (-12 + 9n) = (7n + 4) + 8 Reorder the terms: -12 + 9n = (4 + 7n) + 8 Remove parenthesis around (4 + 7n) -12 + 9n = 4 + 7n + 8 Reorder the terms: -12 + 9n = 4 + 8 + 7n Combine like terms: 4 + 8 = 12 -12 + 9n = 12 + 7n Solving -12 + 9n = 12 + 7n Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-7n' to each side of the equation. -12 + 9n + -7n = 12 + 7n + -7n Combine like terms: 9n + -7n = 2n -12 + 2n = 12 + 7n + -7n Combine like terms: 7n + -7n = 0 -12 + 2n = 12 + 0 -12 + 2n = 12 Add '12' to each side of the equation. -12 + 12 + 2n = 12 + 12 Combine like terms: -12 + 12 = 0 0 + 2n = 12 + 12 2n = 12 + 12 Combine like terms: 12 + 12 = 24 2n = 24 Divide each side by '2'. n = 12 Simplifying n = 12
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