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Simplifying 20 = -7 + 9n Solving 20 = -7 + 9n Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-9n' to each side of the equation. 20 + -9n = -7 + 9n + -9n Combine like terms: 9n + -9n = 0 20 + -9n = -7 + 0 20 + -9n = -7 Add '-20' to each side of the equation. 20 + -20 + -9n = -7 + -20 Combine like terms: 20 + -20 = 0 0 + -9n = -7 + -20 -9n = -7 + -20 Combine like terms: -7 + -20 = -27 -9n = -27 Divide each side by '-9'. n = 3 Simplifying n = 3
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