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Simplifying 20 + 7n = 9n Solving 20 + 7n = 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 + 7n + -9n = 9n + -9n Combine like terms: 7n + -9n = -2n 20 + -2n = 9n + -9n Combine like terms: 9n + -9n = 0 20 + -2n = 0 Add '-20' to each side of the equation. 20 + -20 + -2n = 0 + -20 Combine like terms: 20 + -20 = 0 0 + -2n = 0 + -20 -2n = 0 + -20 Combine like terms: 0 + -20 = -20 -2n = -20 Divide each side by '-2'. n = 10 Simplifying n = 10
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