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Simplifying -9(3n + 7) = -252 Reorder the terms: -9(7 + 3n) = -252 (7 * -9 + 3n * -9) = -252 (-63 + -27n) = -252 Solving -63 + -27n = -252 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '63' to each side of the equation. -63 + 63 + -27n = -252 + 63 Combine like terms: -63 + 63 = 0 0 + -27n = -252 + 63 -27n = -252 + 63 Combine like terms: -252 + 63 = -189 -27n = -189 Divide each side by '-27'. n = 7 Simplifying n = 7
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