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Simplifying -7 + 4(5n + 7) = -19 Reorder the terms: -7 + 4(7 + 5n) = -19 -7 + (7 * 4 + 5n * 4) = -19 -7 + (28 + 20n) = -19 Combine like terms: -7 + 28 = 21 21 + 20n = -19 Solving 21 + 20n = -19 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 + -21 + 20n = -19 + -21 Combine like terms: 21 + -21 = 0 0 + 20n = -19 + -21 20n = -19 + -21 Combine like terms: -19 + -21 = -40 20n = -40 Divide each side by '20'. n = -2 Simplifying n = -2
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