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Simplifying -3n + -6 = -21 Reorder the terms: -6 + -3n = -21 Solving -6 + -3n = -21 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '6' to each side of the equation. -6 + 6 + -3n = -21 + 6 Combine like terms: -6 + 6 = 0 0 + -3n = -21 + 6 -3n = -21 + 6 Combine like terms: -21 + 6 = -15 -3n = -15 Divide each side by '-3'. n = 5 Simplifying n = 5
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