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Simplifying 2n + -1(n + -7) = 12 Reorder the terms: 2n + -1(-7 + n) = 12 2n + (-7 * -1 + n * -1) = 12 2n + (7 + -1n) = 12 Reorder the terms: 7 + 2n + -1n = 12 Combine like terms: 2n + -1n = 1n 7 + 1n = 12 Solving 7 + 1n = 12 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-7' to each side of the equation. 7 + -7 + 1n = 12 + -7 Combine like terms: 7 + -7 = 0 0 + 1n = 12 + -7 1n = 12 + -7 Combine like terms: 12 + -7 = 5 1n = 5 Divide each side by '1'. n = 5 Simplifying n = 5
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