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Simplifying -3(3n + 4) = -7n Reorder the terms: -3(4 + 3n) = -7n (4 * -3 + 3n * -3) = -7n (-12 + -9n) = -7n Solving -12 + -9n = -7n Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '7n' to each side of the equation. -12 + -9n + 7n = -7n + 7n Combine like terms: -9n + 7n = -2n -12 + -2n = -7n + 7n Combine like terms: -7n + 7n = 0 -12 + -2n = 0 Add '12' to each side of the equation. -12 + 12 + -2n = 0 + 12 Combine like terms: -12 + 12 = 0 0 + -2n = 0 + 12 -2n = 0 + 12 Combine like terms: 0 + 12 = 12 -2n = 12 Divide each side by '-2'. n = -6 Simplifying n = -6
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