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Simplifying (6a + 7) + -1(6a + -7) = 0 Reorder the terms: (7 + 6a) + -1(6a + -7) = 0 Remove parenthesis around (7 + 6a) 7 + 6a + -1(6a + -7) = 0 Reorder the terms: 7 + 6a + -1(-7 + 6a) = 0 7 + 6a + (-7 * -1 + 6a * -1) = 0 7 + 6a + (7 + -6a) = 0 Reorder the terms: 7 + 7 + 6a + -6a = 0 Combine like terms: 7 + 7 = 14 14 + 6a + -6a = 0 Combine like terms: 6a + -6a = 0 14 + 0 = 0 14 = 0 Solving 14 = 0 Couldn't find a variable to solve for. This equation is invalid, the left and right sides are not equal, therefore there is no solution.
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