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Simplifying 28 + -4n = -4n + -7(n + 3) Reorder the terms: 28 + -4n = -4n + -7(3 + n) 28 + -4n = -4n + (3 * -7 + n * -7) 28 + -4n = -4n + (-21 + -7n) Reorder the terms: 28 + -4n = -21 + -4n + -7n Combine like terms: -4n + -7n = -11n 28 + -4n = -21 + -11n Solving 28 + -4n = -21 + -11n Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '11n' to each side of the equation. 28 + -4n + 11n = -21 + -11n + 11n Combine like terms: -4n + 11n = 7n 28 + 7n = -21 + -11n + 11n Combine like terms: -11n + 11n = 0 28 + 7n = -21 + 0 28 + 7n = -21 Add '-28' to each side of the equation. 28 + -28 + 7n = -21 + -28 Combine like terms: 28 + -28 = 0 0 + 7n = -21 + -28 7n = -21 + -28 Combine like terms: -21 + -28 = -49 7n = -49 Divide each side by '7'. n = -7 Simplifying n = -7
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