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Simplifying 15n + -2(n + 6) + -9 = 4 Reorder the terms: 15n + -2(6 + n) + -9 = 4 15n + (6 * -2 + n * -2) + -9 = 4 15n + (-12 + -2n) + -9 = 4 Reorder the terms: -12 + -9 + 15n + -2n = 4 Combine like terms: -12 + -9 = -21 -21 + 15n + -2n = 4 Combine like terms: 15n + -2n = 13n -21 + 13n = 4 Solving -21 + 13n = 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 + 13n = 4 + 21 Combine like terms: -21 + 21 = 0 0 + 13n = 4 + 21 13n = 4 + 21 Combine like terms: 4 + 21 = 25 13n = 25 Divide each side by '13'. n = 1.923076923 Simplifying n = 1.923076923
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