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Simplifying 20n + 400 = 10n + 100 Reorder the terms: 400 + 20n = 10n + 100 Reorder the terms: 400 + 20n = 100 + 10n Solving 400 + 20n = 100 + 10n Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-10n' to each side of the equation. 400 + 20n + -10n = 100 + 10n + -10n Combine like terms: 20n + -10n = 10n 400 + 10n = 100 + 10n + -10n Combine like terms: 10n + -10n = 0 400 + 10n = 100 + 0 400 + 10n = 100 Add '-400' to each side of the equation. 400 + -400 + 10n = 100 + -400 Combine like terms: 400 + -400 = 0 0 + 10n = 100 + -400 10n = 100 + -400 Combine like terms: 100 + -400 = -300 10n = -300 Divide each side by '10'. n = -30 Simplifying n = -30
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