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Simplifying 7 + 4n = -1(1 + -4n) + 8 7 + 4n = (1 * -1 + -4n * -1) + 8 7 + 4n = (-1 + 4n) + 8 Reorder the terms: 7 + 4n = -1 + 8 + 4n Combine like terms: -1 + 8 = 7 7 + 4n = 7 + 4n Add '-7' to each side of the equation. 7 + -7 + 4n = 7 + -7 + 4n Combine like terms: 7 + -7 = 0 0 + 4n = 7 + -7 + 4n 4n = 7 + -7 + 4n Combine like terms: 7 + -7 = 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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