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Simplifying 7(7x + 3 + 3n) = 0 Reorder the terms: 7(3 + 3n + 7x) = 0 (3 * 7 + 3n * 7 + 7x * 7) = 0 (21 + 21n + 49x) = 0 Solving 21 + 21n + 49x = 0 Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-21' to each side of the equation. 21 + 21n + -21 + 49x = 0 + -21 Reorder the terms: 21 + -21 + 21n + 49x = 0 + -21 Combine like terms: 21 + -21 = 0 0 + 21n + 49x = 0 + -21 21n + 49x = 0 + -21 Combine like terms: 0 + -21 = -21 21n + 49x = -21 Add '-49x' to each side of the equation. 21n + 49x + -49x = -21 + -49x Combine like terms: 49x + -49x = 0 21n + 0 = -21 + -49x 21n = -21 + -49x Divide each side by '21'. n = -1 + -2.333333333x Simplifying n = -1 + -2.333333333x
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