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Simplifying -4(n + 7) = -3n + -21 Reorder the terms: -4(7 + n) = -3n + -21 (7 * -4 + n * -4) = -3n + -21 (-28 + -4n) = -3n + -21 Reorder the terms: -28 + -4n = -21 + -3n Solving -28 + -4n = -21 + -3n Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '3n' to each side of the equation. -28 + -4n + 3n = -21 + -3n + 3n Combine like terms: -4n + 3n = -1n -28 + -1n = -21 + -3n + 3n Combine like terms: -3n + 3n = 0 -28 + -1n = -21 + 0 -28 + -1n = -21 Add '28' to each side of the equation. -28 + 28 + -1n = -21 + 28 Combine like terms: -28 + 28 = 0 0 + -1n = -21 + 28 -1n = -21 + 28 Combine like terms: -21 + 28 = 7 -1n = 7 Divide each side by '-1'. n = -7 Simplifying n = -7
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