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Simplifying 7 = 2(2 + 9n) + 2n 7 = (2 * 2 + 9n * 2) + 2n 7 = (4 + 18n) + 2n Combine like terms: 18n + 2n = 20n 7 = 4 + 20n Solving 7 = 4 + 20n Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-20n' to each side of the equation. 7 + -20n = 4 + 20n + -20n Combine like terms: 20n + -20n = 0 7 + -20n = 4 + 0 7 + -20n = 4 Add '-7' to each side of the equation. 7 + -7 + -20n = 4 + -7 Combine like terms: 7 + -7 = 0 0 + -20n = 4 + -7 -20n = 4 + -7 Combine like terms: 4 + -7 = -3 -20n = -3 Divide each side by '-20'. n = 0.15 Simplifying n = 0.15
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