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Simplifying 7[1 + -5(-9x + -2)] = 315x + 77 Reorder the terms: 7[1 + -5(-2 + -9x)] = 315x + 77 7[1 + (-2 * -5 + -9x * -5)] = 315x + 77 7[1 + (10 + 45x)] = 315x + 77 Combine like terms: 1 + 10 = 11 7[11 + 45x] = 315x + 77 [11 * 7 + 45x * 7] = 315x + 77 [77 + 315x] = 315x + 77 Reorder the terms: 77 + 315x = 77 + 315x Add '-77' to each side of the equation. 77 + -77 + 315x = 77 + -77 + 315x Combine like terms: 77 + -77 = 0 0 + 315x = 77 + -77 + 315x 315x = 77 + -77 + 315x Combine like terms: 77 + -77 = 0 315x = 0 + 315x 315x = 315x Add '-315x' to each side of the equation. 315x + -315x = 315x + -315x Combine like terms: 315x + -315x = 0 0 = 315x + -315x Combine like terms: 315x + -315x = 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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