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Simplifying 30r + 42 + 36n = 320 Reorder the terms: 42 + 36n + 30r = 320 Solving 42 + 36n + 30r = 320 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-42' to each side of the equation. 42 + 36n + -42 + 30r = 320 + -42 Reorder the terms: 42 + -42 + 36n + 30r = 320 + -42 Combine like terms: 42 + -42 = 0 0 + 36n + 30r = 320 + -42 36n + 30r = 320 + -42 Combine like terms: 320 + -42 = 278 36n + 30r = 278 Add '-30r' to each side of the equation. 36n + 30r + -30r = 278 + -30r Combine like terms: 30r + -30r = 0 36n + 0 = 278 + -30r 36n = 278 + -30r Divide each side by '36'. n = 7.722222222 + -0.8333333333r Simplifying n = 7.722222222 + -0.8333333333r
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