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Simplifying 56 = -7(-3n + 3) + -1(7 + -7n) Reorder the terms: 56 = -7(3 + -3n) + -1(7 + -7n) 56 = (3 * -7 + -3n * -7) + -1(7 + -7n) 56 = (-21 + 21n) + -1(7 + -7n) 56 = -21 + 21n + (7 * -1 + -7n * -1) 56 = -21 + 21n + (-7 + 7n) Reorder the terms: 56 = -21 + -7 + 21n + 7n Combine like terms: -21 + -7 = -28 56 = -28 + 21n + 7n Combine like terms: 21n + 7n = 28n 56 = -28 + 28n Solving 56 = -28 + 28n Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-28n' to each side of the equation. 56 + -28n = -28 + 28n + -28n Combine like terms: 28n + -28n = 0 56 + -28n = -28 + 0 56 + -28n = -28 Add '-56' to each side of the equation. 56 + -56 + -28n = -28 + -56 Combine like terms: 56 + -56 = 0 0 + -28n = -28 + -56 -28n = -28 + -56 Combine like terms: -28 + -56 = -84 -28n = -84 Divide each side by '-28'. n = 3 Simplifying n = 3
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