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Simplifying 21n + 7 = 7n Reorder the terms: 7 + 21n = 7n Solving 7 + 21n = 7n Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-7n' to each side of the equation. 7 + 21n + -7n = 7n + -7n Combine like terms: 21n + -7n = 14n 7 + 14n = 7n + -7n Combine like terms: 7n + -7n = 0 7 + 14n = 0 Add '-7' to each side of the equation. 7 + -7 + 14n = 0 + -7 Combine like terms: 7 + -7 = 0 0 + 14n = 0 + -7 14n = 0 + -7 Combine like terms: 0 + -7 = -7 14n = -7 Divide each side by '14'. n = -0.5 Simplifying n = -0.5
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