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Simplifying -2(a + -7) + 2(a + 3) = 13 Reorder the terms: -2(-7 + a) + 2(a + 3) = 13 (-7 * -2 + a * -2) + 2(a + 3) = 13 (14 + -2a) + 2(a + 3) = 13 Reorder the terms: 14 + -2a + 2(3 + a) = 13 14 + -2a + (3 * 2 + a * 2) = 13 14 + -2a + (6 + 2a) = 13 Reorder the terms: 14 + 6 + -2a + 2a = 13 Combine like terms: 14 + 6 = 20 20 + -2a + 2a = 13 Combine like terms: -2a + 2a = 0 20 + 0 = 13 20 = 13 Solving 20 = 13 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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