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Simplifying 2n + -1(7n + -7) = 12 Reorder the terms: 2n + -1(-7 + 7n) = 12 2n + (-7 * -1 + 7n * -1) = 12 2n + (7 + -7n) = 12 Reorder the terms: 7 + 2n + -7n = 12 Combine like terms: 2n + -7n = -5n 7 + -5n = 12 Solving 7 + -5n = 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 + -5n = 12 + -7 Combine like terms: 7 + -7 = 0 0 + -5n = 12 + -7 -5n = 12 + -7 Combine like terms: 12 + -7 = 5 -5n = 5 Divide each side by '-5'. n = -1 Simplifying n = -1
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