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Simplifying 50n + 90 = 40n + 120 Reorder the terms: 90 + 50n = 40n + 120 Reorder the terms: 90 + 50n = 120 + 40n Solving 90 + 50n = 120 + 40n Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-40n' to each side of the equation. 90 + 50n + -40n = 120 + 40n + -40n Combine like terms: 50n + -40n = 10n 90 + 10n = 120 + 40n + -40n Combine like terms: 40n + -40n = 0 90 + 10n = 120 + 0 90 + 10n = 120 Add '-90' to each side of the equation. 90 + -90 + 10n = 120 + -90 Combine like terms: 90 + -90 = 0 0 + 10n = 120 + -90 10n = 120 + -90 Combine like terms: 120 + -90 = 30 10n = 30 Divide each side by '10'. n = 3 Simplifying n = 3
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