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Simplifying 2n + 21 = 4n + 8 Reorder the terms: 21 + 2n = 4n + 8 Reorder the terms: 21 + 2n = 8 + 4n Solving 21 + 2n = 8 + 4n Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-4n' to each side of the equation. 21 + 2n + -4n = 8 + 4n + -4n Combine like terms: 2n + -4n = -2n 21 + -2n = 8 + 4n + -4n Combine like terms: 4n + -4n = 0 21 + -2n = 8 + 0 21 + -2n = 8 Add '-21' to each side of the equation. 21 + -21 + -2n = 8 + -21 Combine like terms: 21 + -21 = 0 0 + -2n = 8 + -21 -2n = 8 + -21 Combine like terms: 8 + -21 = -13 -2n = -13 Divide each side by '-2'. n = 6.5 Simplifying n = 6.5
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