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Simplifying 7n + 4 + -5n = 2n + 4 Reorder the terms: 4 + 7n + -5n = 2n + 4 Combine like terms: 7n + -5n = 2n 4 + 2n = 2n + 4 Reorder the terms: 4 + 2n = 4 + 2n Add '-4' to each side of the equation. 4 + -4 + 2n = 4 + -4 + 2n Combine like terms: 4 + -4 = 0 0 + 2n = 4 + -4 + 2n 2n = 4 + -4 + 2n Combine like terms: 4 + -4 = 0 2n = 0 + 2n 2n = 2n Add '-2n' to each side of the equation. 2n + -2n = 2n + -2n Combine like terms: 2n + -2n = 0 0 = 2n + -2n Combine like terms: 2n + -2n = 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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