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Simplifying a + -1 + a = -4 + 2a + 3 Reorder the terms: -1 + a + a = -4 + 2a + 3 Combine like terms: a + a = 2a -1 + 2a = -4 + 2a + 3 Reorder the terms: -1 + 2a = -4 + 3 + 2a Combine like terms: -4 + 3 = -1 -1 + 2a = -1 + 2a Add '1' to each side of the equation. -1 + 1 + 2a = -1 + 1 + 2a Combine like terms: -1 + 1 = 0 0 + 2a = -1 + 1 + 2a 2a = -1 + 1 + 2a Combine like terms: -1 + 1 = 0 2a = 0 + 2a 2a = 2a Add '-2a' to each side of the equation. 2a + -2a = 2a + -2a Combine like terms: 2a + -2a = 0 0 = 2a + -2a Combine like terms: 2a + -2a = 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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