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Simplifying -4(n + 3) + 15 = -2n + -9 Reorder the terms: -4(3 + n) + 15 = -2n + -9 (3 * -4 + n * -4) + 15 = -2n + -9 (-12 + -4n) + 15 = -2n + -9 Reorder the terms: -12 + 15 + -4n = -2n + -9 Combine like terms: -12 + 15 = 3 3 + -4n = -2n + -9 Reorder the terms: 3 + -4n = -9 + -2n Solving 3 + -4n = -9 + -2n Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '2n' to each side of the equation. 3 + -4n + 2n = -9 + -2n + 2n Combine like terms: -4n + 2n = -2n 3 + -2n = -9 + -2n + 2n Combine like terms: -2n + 2n = 0 3 + -2n = -9 + 0 3 + -2n = -9 Add '-3' to each side of the equation. 3 + -3 + -2n = -9 + -3 Combine like terms: 3 + -3 = 0 0 + -2n = -9 + -3 -2n = -9 + -3 Combine like terms: -9 + -3 = -12 -2n = -12 Divide each side by '-2'. n = 6 Simplifying n = 6
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