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Simplifying 3(2n + -7) + 12 = 39 Reorder the terms: 3(-7 + 2n) + 12 = 39 (-7 * 3 + 2n * 3) + 12 = 39 (-21 + 6n) + 12 = 39 Reorder the terms: -21 + 12 + 6n = 39 Combine like terms: -21 + 12 = -9 -9 + 6n = 39 Solving -9 + 6n = 39 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '9' to each side of the equation. -9 + 9 + 6n = 39 + 9 Combine like terms: -9 + 9 = 0 0 + 6n = 39 + 9 6n = 39 + 9 Combine like terms: 39 + 9 = 48 6n = 48 Divide each side by '6'. n = 8 Simplifying n = 8
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