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Simplifying 6n + 21 = 21n + -15 Reorder the terms: 21 + 6n = 21n + -15 Reorder the terms: 21 + 6n = -15 + 21n Solving 21 + 6n = -15 + 21n Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-21n' to each side of the equation. 21 + 6n + -21n = -15 + 21n + -21n Combine like terms: 6n + -21n = -15n 21 + -15n = -15 + 21n + -21n Combine like terms: 21n + -21n = 0 21 + -15n = -15 + 0 21 + -15n = -15 Add '-21' to each side of the equation. 21 + -21 + -15n = -15 + -21 Combine like terms: 21 + -21 = 0 0 + -15n = -15 + -21 -15n = -15 + -21 Combine like terms: -15 + -21 = -36 -15n = -36 Divide each side by '-15'. n = 2.4 Simplifying n = 2.4
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