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Simplifying 2 + -7n + 5n = 42 + -84 Combine like terms: -7n + 5n = -2n 2 + -2n = 42 + -84 Combine like terms: 42 + -84 = -42 2 + -2n = -42 Solving 2 + -2n = -42 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + -2n = -42 + -2 Combine like terms: 2 + -2 = 0 0 + -2n = -42 + -2 -2n = -42 + -2 Combine like terms: -42 + -2 = -44 -2n = -44 Divide each side by '-2'. n = 22 Simplifying n = 22
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