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Simplifying 0.35(20) + 0.15n = 0.10(20 + n) Multiply 0.35 * 20 7 + 0.15n = 0.10(20 + n) 7 + 0.15n = (20 * 0.10 + n * 0.10) 7 + 0.15n = (2 + 0.10n) Solving 7 + 0.15n = 2 + 0.10n Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-0.10n' to each side of the equation. 7 + 0.15n + -0.10n = 2 + 0.10n + -0.10n Combine like terms: 0.15n + -0.10n = 0.05n 7 + 0.05n = 2 + 0.10n + -0.10n Combine like terms: 0.10n + -0.10n = 0.00 7 + 0.05n = 2 + 0.00 7 + 0.05n = 2 Add '-7' to each side of the equation. 7 + -7 + 0.05n = 2 + -7 Combine like terms: 7 + -7 = 0 0 + 0.05n = 2 + -7 0.05n = 2 + -7 Combine like terms: 2 + -7 = -5 0.05n = -5 Divide each side by '0.05'. n = -100 Simplifying n = -100
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