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Simplifying 20(n + 2) = 4(10 + 5n) Reorder the terms: 20(2 + n) = 4(10 + 5n) (2 * 20 + n * 20) = 4(10 + 5n) (40 + 20n) = 4(10 + 5n) 40 + 20n = (10 * 4 + 5n * 4) 40 + 20n = (40 + 20n) Add '-40' to each side of the equation. 40 + -40 + 20n = 40 + -40 + 20n Combine like terms: 40 + -40 = 0 0 + 20n = 40 + -40 + 20n 20n = 40 + -40 + 20n Combine like terms: 40 + -40 = 0 20n = 0 + 20n 20n = 20n Add '-20n' to each side of the equation. 20n + -20n = 20n + -20n Combine like terms: 20n + -20n = 0 0 = 20n + -20n Combine like terms: 20n + -20n = 0 0 = 0 Solving 0 = 0 Couldn't find a variable to solve for. This equation is an identity, all real numbers are solutions.
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