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Simplifying 57 = -3(-4 + n) 57 = (-4 * -3 + n * -3) 57 = (12 + -3n) Solving 57 = 12 + -3n Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '3n' to each side of the equation. 57 + 3n = 12 + -3n + 3n Combine like terms: -3n + 3n = 0 57 + 3n = 12 + 0 57 + 3n = 12 Add '-57' to each side of the equation. 57 + -57 + 3n = 12 + -57 Combine like terms: 57 + -57 = 0 0 + 3n = 12 + -57 3n = 12 + -57 Combine like terms: 12 + -57 = -45 3n = -45 Divide each side by '3'. n = -15 Simplifying n = -15
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