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Simplifying -7a + 12 = 4 + -1(7a + -6) Reorder the terms: 12 + -7a = 4 + -1(7a + -6) Reorder the terms: 12 + -7a = 4 + -1(-6 + 7a) 12 + -7a = 4 + (-6 * -1 + 7a * -1) 12 + -7a = 4 + (6 + -7a) Combine like terms: 4 + 6 = 10 12 + -7a = 10 + -7a Add '7a' to each side of the equation. 12 + -7a + 7a = 10 + -7a + 7a Combine like terms: -7a + 7a = 0 12 + 0 = 10 + -7a + 7a 12 = 10 + -7a + 7a Combine like terms: -7a + 7a = 0 12 = 10 + 0 12 = 10 Solving 12 = 10 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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