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Simplifying (30 + 3n) + -1(20 + 2n) = 0 Remove parenthesis around (30 + 3n) 30 + 3n + -1(20 + 2n) = 0 30 + 3n + (20 * -1 + 2n * -1) = 0 30 + 3n + (-20 + -2n) = 0 Reorder the terms: 30 + -20 + 3n + -2n = 0 Combine like terms: 30 + -20 = 10 10 + 3n + -2n = 0 Combine like terms: 3n + -2n = 1n 10 + 1n = 0 Solving 10 + 1n = 0 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-10' to each side of the equation. 10 + -10 + 1n = 0 + -10 Combine like terms: 10 + -10 = 0 0 + 1n = 0 + -10 1n = 0 + -10 Combine like terms: 0 + -10 = -10 1n = -10 Divide each side by '1'. n = -10 Simplifying n = -10
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