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Simplifying 20(n + 7) = 4(35 + 5n) Reorder the terms: 20(7 + n) = 4(35 + 5n) (7 * 20 + n * 20) = 4(35 + 5n) (140 + 20n) = 4(35 + 5n) 140 + 20n = (35 * 4 + 5n * 4) 140 + 20n = (140 + 20n) Add '-140' to each side of the equation. 140 + -140 + 20n = 140 + -140 + 20n Combine like terms: 140 + -140 = 0 0 + 20n = 140 + -140 + 20n 20n = 140 + -140 + 20n Combine like terms: 140 + -140 = 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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