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Simplifying -9 + -4 = -3(2n + 1) Combine like terms: -9 + -4 = -13 -13 = -3(2n + 1) Reorder the terms: -13 = -3(1 + 2n) -13 = (1 * -3 + 2n * -3) -13 = (-3 + -6n) Solving -13 = -3 + -6n Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '6n' to each side of the equation. -13 + 6n = -3 + -6n + 6n Combine like terms: -6n + 6n = 0 -13 + 6n = -3 + 0 -13 + 6n = -3 Add '13' to each side of the equation. -13 + 13 + 6n = -3 + 13 Combine like terms: -13 + 13 = 0 0 + 6n = -3 + 13 6n = -3 + 13 Combine like terms: -3 + 13 = 10 6n = 10 Divide each side by '6'. n = 1.666666667 Simplifying n = 1.666666667
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