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Simplifying 15 + 15n = 40 + 20n Solving 15 + 15n = 40 + 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. 15 + 15n + -20n = 40 + 20n + -20n Combine like terms: 15n + -20n = -5n 15 + -5n = 40 + 20n + -20n Combine like terms: 20n + -20n = 0 15 + -5n = 40 + 0 15 + -5n = 40 Add '-15' to each side of the equation. 15 + -15 + -5n = 40 + -15 Combine like terms: 15 + -15 = 0 0 + -5n = 40 + -15 -5n = 40 + -15 Combine like terms: 40 + -15 = 25 -5n = 25 Divide each side by '-5'. n = -5 Simplifying n = -5
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