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Simplifying 3(20n + -4) + 120 = 12(5n + 9) Reorder the terms: 3(-4 + 20n) + 120 = 12(5n + 9) (-4 * 3 + 20n * 3) + 120 = 12(5n + 9) (-12 + 60n) + 120 = 12(5n + 9) Reorder the terms: -12 + 120 + 60n = 12(5n + 9) Combine like terms: -12 + 120 = 108 108 + 60n = 12(5n + 9) Reorder the terms: 108 + 60n = 12(9 + 5n) 108 + 60n = (9 * 12 + 5n * 12) 108 + 60n = (108 + 60n) Add '-108' to each side of the equation. 108 + -108 + 60n = 108 + -108 + 60n Combine like terms: 108 + -108 = 0 0 + 60n = 108 + -108 + 60n 60n = 108 + -108 + 60n Combine like terms: 108 + -108 = 0 60n = 0 + 60n 60n = 60n Add '-60n' to each side of the equation. 60n + -60n = 60n + -60n Combine like terms: 60n + -60n = 0 0 = 60n + -60n Combine like terms: 60n + -60n = 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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