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Simplifying 0.4n + 7.2 = 0.31n Reorder the terms: 7.2 + 0.4n = 0.31n Solving 7.2 + 0.4n = 0.31n Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-0.31n' to each side of the equation. 7.2 + 0.4n + -0.31n = 0.31n + -0.31n Combine like terms: 0.4n + -0.31n = 0.09n 7.2 + 0.09n = 0.31n + -0.31n Combine like terms: 0.31n + -0.31n = 0.00 7.2 + 0.09n = 0.00 Add '-7.2' to each side of the equation. 7.2 + -7.2 + 0.09n = 0.00 + -7.2 Combine like terms: 7.2 + -7.2 = 0.0 0.0 + 0.09n = 0.00 + -7.2 0.09n = 0.00 + -7.2 Combine like terms: 0.00 + -7.2 = -7.2 0.09n = -7.2 Divide each side by '0.09'. n = -80 Simplifying n = -80
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