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Simplifying 4(n + 20) = 4n + 80 Reorder the terms: 4(20 + n) = 4n + 80 (20 * 4 + n * 4) = 4n + 80 (80 + 4n) = 4n + 80 Reorder the terms: 80 + 4n = 80 + 4n Add '-80' to each side of the equation. 80 + -80 + 4n = 80 + -80 + 4n Combine like terms: 80 + -80 = 0 0 + 4n = 80 + -80 + 4n 4n = 80 + -80 + 4n Combine like terms: 80 + -80 = 0 4n = 0 + 4n 4n = 4n Add '-4n' to each side of the equation. 4n + -4n = 4n + -4n Combine like terms: 4n + -4n = 0 0 = 4n + -4n Combine like terms: 4n + -4n = 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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