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Simplifying 0.30n + 140 = 0.70n Reorder the terms: 140 + 0.30n = 0.70n Solving 140 + 0.30n = 0.70n Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-0.70n' to each side of the equation. 140 + 0.30n + -0.70n = 0.70n + -0.70n Combine like terms: 0.30n + -0.70n = -0.4n 140 + -0.4n = 0.70n + -0.70n Combine like terms: 0.70n + -0.70n = 0.00 140 + -0.4n = 0.00 Add '-140' to each side of the equation. 140 + -140 + -0.4n = 0.00 + -140 Combine like terms: 140 + -140 = 0 0 + -0.4n = 0.00 + -140 -0.4n = 0.00 + -140 Combine like terms: 0.00 + -140 = -140 -0.4n = -140 Divide each side by '-0.4'. n = 350 Simplifying n = 350
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