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Simplifying (a + -2) + -1(a + -2) = 0 Reorder the terms: (-2 + a) + -1(a + -2) = 0 Remove parenthesis around (-2 + a) -2 + a + -1(a + -2) = 0 Reorder the terms: -2 + a + -1(-2 + a) = 0 -2 + a + (-2 * -1 + a * -1) = 0 -2 + a + (2 + -1a) = 0 Reorder the terms: -2 + 2 + a + -1a = 0 Combine like terms: -2 + 2 = 0 0 + a + -1a = 0 a + -1a = 0 Combine like terms: a + -1a = 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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