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Simplifying (7a + 2) + -1(2a + -4) = 6 + 5a Reorder the terms: (2 + 7a) + -1(2a + -4) = 6 + 5a Remove parenthesis around (2 + 7a) 2 + 7a + -1(2a + -4) = 6 + 5a Reorder the terms: 2 + 7a + -1(-4 + 2a) = 6 + 5a 2 + 7a + (-4 * -1 + 2a * -1) = 6 + 5a 2 + 7a + (4 + -2a) = 6 + 5a Reorder the terms: 2 + 4 + 7a + -2a = 6 + 5a Combine like terms: 2 + 4 = 6 6 + 7a + -2a = 6 + 5a Combine like terms: 7a + -2a = 5a 6 + 5a = 6 + 5a Add '-6' to each side of the equation. 6 + -6 + 5a = 6 + -6 + 5a Combine like terms: 6 + -6 = 0 0 + 5a = 6 + -6 + 5a 5a = 6 + -6 + 5a Combine like terms: 6 + -6 = 0 5a = 0 + 5a 5a = 5a Add '-5a' to each side of the equation. 5a + -5a = 5a + -5a Combine like terms: 5a + -5a = 0 0 = 5a + -5a Combine like terms: 5a + -5a = 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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