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Simplifying 7(n + -3) = 2(2n + -3) Reorder the terms: 7(-3 + n) = 2(2n + -3) (-3 * 7 + n * 7) = 2(2n + -3) (-21 + 7n) = 2(2n + -3) Reorder the terms: -21 + 7n = 2(-3 + 2n) -21 + 7n = (-3 * 2 + 2n * 2) -21 + 7n = (-6 + 4n) Solving -21 + 7n = -6 + 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 + 7n + -4n = -6 + 4n + -4n Combine like terms: 7n + -4n = 3n -21 + 3n = -6 + 4n + -4n Combine like terms: 4n + -4n = 0 -21 + 3n = -6 + 0 -21 + 3n = -6 Add '21' to each side of the equation. -21 + 21 + 3n = -6 + 21 Combine like terms: -21 + 21 = 0 0 + 3n = -6 + 21 3n = -6 + 21 Combine like terms: -6 + 21 = 15 3n = 15 Divide each side by '3'. n = 5 Simplifying n = 5
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