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Simplifying 2n + -12 = 15 + -7n Reorder the terms: -12 + 2n = 15 + -7n Solving -12 + 2n = 15 + -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 + 2n + 7n = 15 + -7n + 7n Combine like terms: 2n + 7n = 9n -12 + 9n = 15 + -7n + 7n Combine like terms: -7n + 7n = 0 -12 + 9n = 15 + 0 -12 + 9n = 15 Add '12' to each side of the equation. -12 + 12 + 9n = 15 + 12 Combine like terms: -12 + 12 = 0 0 + 9n = 15 + 12 9n = 15 + 12 Combine like terms: 15 + 12 = 27 9n = 27 Divide each side by '9'. n = 3 Simplifying n = 3
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