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Simplifying 20 + 4n = -4(7 + -5n) 20 + 4n = (7 * -4 + -5n * -4) 20 + 4n = (-28 + 20n) Solving 20 + 4n = -28 + 20n Solving for variable 'n'. Move all terms containing n to the left, all other terms to the right. Add '-20n' to each side of the equation. 20 + 4n + -20n = -28 + 20n + -20n Combine like terms: 4n + -20n = -16n 20 + -16n = -28 + 20n + -20n Combine like terms: 20n + -20n = 0 20 + -16n = -28 + 0 20 + -16n = -28 Add '-20' to each side of the equation. 20 + -20 + -16n = -28 + -20 Combine like terms: 20 + -20 = 0 0 + -16n = -28 + -20 -16n = -28 + -20 Combine like terms: -28 + -20 = -48 -16n = -48 Divide each side by '-16'. n = 3 Simplifying n = 3
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