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Simplifying -7n + 21 = 1 + -2n Reorder the terms: 21 + -7n = 1 + -2n Solving 21 + -7n = 1 + -2n Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '2n' to each side of the equation. 21 + -7n + 2n = 1 + -2n + 2n Combine like terms: -7n + 2n = -5n 21 + -5n = 1 + -2n + 2n Combine like terms: -2n + 2n = 0 21 + -5n = 1 + 0 21 + -5n = 1 Add '-21' to each side of the equation. 21 + -21 + -5n = 1 + -21 Combine like terms: 21 + -21 = 0 0 + -5n = 1 + -21 -5n = 1 + -21 Combine like terms: 1 + -21 = -20 -5n = -20 Divide each side by '-5'. n = 4 Simplifying n = 4
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