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Simplifying 21n + 3 = 7n + -3 Reorder the terms: 3 + 21n = 7n + -3 Reorder the terms: 3 + 21n = -3 + 7n Solving 3 + 21n = -3 + 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. 3 + 21n + -7n = -3 + 7n + -7n Combine like terms: 21n + -7n = 14n 3 + 14n = -3 + 7n + -7n Combine like terms: 7n + -7n = 0 3 + 14n = -3 + 0 3 + 14n = -3 Add '-3' to each side of the equation. 3 + -3 + 14n = -3 + -3 Combine like terms: 3 + -3 = 0 0 + 14n = -3 + -3 14n = -3 + -3 Combine like terms: -3 + -3 = -6 14n = -6 Divide each side by '14'. n = -0.4285714286 Simplifying n = -0.4285714286
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