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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 = 19 1n = 19 Divide each side by '1'. n = 19 Simplifying n = 19
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