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