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Simplifying -15 + -3(2 + -1n) = 4 -15 + (2 * -3 + -1n * -3) = 4 -15 + (-6 + 3n) = 4 Combine like terms: -15 + -6 = -21 -21 + 3n = 4 Solving -21 + 3n = 4 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 + 3n = 4 + 21 Combine like terms: -21 + 21 = 0 0 + 3n = 4 + 21 3n = 4 + 21 Combine like terms: 4 + 21 = 25 3n = 25 Divide each side by '3'. n = 8.333333333 Simplifying n = 8.333333333
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