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Simplifying 2n + 21 = 5n + 3 Reorder the terms: 21 + 2n = 5n + 3 Reorder the terms: 21 + 2n = 3 + 5n Solving 21 + 2n = 3 + 5n Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-5n' to each side of the equation. 21 + 2n + -5n = 3 + 5n + -5n Combine like terms: 2n + -5n = -3n 21 + -3n = 3 + 5n + -5n Combine like terms: 5n + -5n = 0 21 + -3n = 3 + 0 21 + -3n = 3 Add '-21' to each side of the equation. 21 + -21 + -3n = 3 + -21 Combine like terms: 21 + -21 = 0 0 + -3n = 3 + -21 -3n = 3 + -21 Combine like terms: 3 + -21 = -18 -3n = -18 Divide each side by '-3'. n = 6 Simplifying n = 6
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