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Simplifying (x + 1) + -1(1 + -1x) = 2x Reorder the terms: (1 + x) + -1(1 + -1x) = 2x Remove parenthesis around (1 + x) 1 + x + -1(1 + -1x) = 2x 1 + x + (1 * -1 + -1x * -1) = 2x 1 + x + (-1 + 1x) = 2x Reorder the terms: 1 + -1 + x + 1x = 2x Combine like terms: 1 + -1 = 0 0 + x + 1x = 2x x + 1x = 2x Combine like terms: x + 1x = 2x 2x = 2x Add '-2x' to each side of the equation. 2x + -2x = 2x + -2x Combine like terms: 2x + -2x = 0 0 = 2x + -2x Combine like terms: 2x + -2x = 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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