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Simplifying -7n + -5(3 + n) = -99 -7n + (3 * -5 + n * -5) = -99 -7n + (-15 + -5n) = -99 Reorder the terms: -15 + -7n + -5n = -99 Combine like terms: -7n + -5n = -12n -15 + -12n = -99 Solving -15 + -12n = -99 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '15' to each side of the equation. -15 + 15 + -12n = -99 + 15 Combine like terms: -15 + 15 = 0 0 + -12n = -99 + 15 -12n = -99 + 15 Combine like terms: -99 + 15 = -84 -12n = -84 Divide each side by '-12'. n = 7 Simplifying n = 7
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