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Simplifying 2n + -3 = 21 Reorder the terms: -3 + 2n = 21 Solving -3 + 2n = 21 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + 2n = 21 + 3 Combine like terms: -3 + 3 = 0 0 + 2n = 21 + 3 2n = 21 + 3 Combine like terms: 21 + 3 = 24 2n = 24 Divide each side by '2'. n = 12 Simplifying n = 12
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