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Simplifying -3(n + -7) = -4n Reorder the terms: -3(-7 + n) = -4n (-7 * -3 + n * -3) = -4n (21 + -3n) = -4n Solving 21 + -3n = -4n Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '4n' to each side of the equation. 21 + -3n + 4n = -4n + 4n Combine like terms: -3n + 4n = 1n 21 + 1n = -4n + 4n Combine like terms: -4n + 4n = 0 21 + 1n = 0 Add '-21' to each side of the equation. 21 + -21 + 1n = 0 + -21 Combine like terms: 21 + -21 = 0 0 + 1n = 0 + -21 1n = 0 + -21 Combine like terms: 0 + -21 = -21 1n = -21 Divide each side by '1'. n = -21 Simplifying n = -21
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