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Simplifying 7(n + -12) = -21 Reorder the terms: 7(-12 + n) = -21 (-12 * 7 + n * 7) = -21 (-84 + 7n) = -21 Solving -84 + 7n = -21 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '84' to each side of the equation. -84 + 84 + 7n = -21 + 84 Combine like terms: -84 + 84 = 0 0 + 7n = -21 + 84 7n = -21 + 84 Combine like terms: -21 + 84 = 63 7n = 63 Divide each side by '7'. n = 9 Simplifying n = 9
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