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Simplifying -3n + 7(4n + -3) = -221 Reorder the terms: -3n + 7(-3 + 4n) = -221 -3n + (-3 * 7 + 4n * 7) = -221 -3n + (-21 + 28n) = -221 Reorder the terms: -21 + -3n + 28n = -221 Combine like terms: -3n + 28n = 25n -21 + 25n = -221 Solving -21 + 25n = -221 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '21' to each side of the equation. -21 + 21 + 25n = -221 + 21 Combine like terms: -21 + 21 = 0 0 + 25n = -221 + 21 25n = -221 + 21 Combine like terms: -221 + 21 = -200 25n = -200 Divide each side by '25'. n = -8 Simplifying n = -8
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