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Simplifying 42n + -40 = 21n Reorder the terms: -40 + 42n = 21n Solving -40 + 42n = 21n Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-21n' to each side of the equation. -40 + 42n + -21n = 21n + -21n Combine like terms: 42n + -21n = 21n -40 + 21n = 21n + -21n Combine like terms: 21n + -21n = 0 -40 + 21n = 0 Add '40' to each side of the equation. -40 + 40 + 21n = 0 + 40 Combine like terms: -40 + 40 = 0 0 + 21n = 0 + 40 21n = 0 + 40 Combine like terms: 0 + 40 = 40 21n = 40 Divide each side by '21'. n = 1.904761905 Simplifying n = 1.904761905
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