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Simplifying in(x + 2) + -1in(x + -1) = in(3) Reorder the terms: in(2 + x) + -1in(x + -1) = in(3) (2 * in + x * in) + -1in(x + -1) = in(3) (2in + inx) + -1in(x + -1) = in(3) Reorder the terms: 2in + inx + -1in(-1 + x) = in(3) 2in + inx + (-1 * -1in + x * -1in) = in(3) 2in + inx + (1in + -1inx) = in(3) Reorder the terms: 2in + 1in + inx + -1inx = in(3) Combine like terms: 2in + 1in = 3in 3in + inx + -1inx = in(3) Combine like terms: inx + -1inx = 0 3in + 0 = in(3) 3in = in(3) Reorder the terms for easier multiplication: 3in = 3in Add '-3in' to each side of the equation. 3in + -3in = 3in + -3in Combine like terms: 3in + -3in = 0 0 = 3in + -3in Combine like terms: 3in + -3in = 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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