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Simplifying -9a + 8 = -3(a + 7) + 2(1 + -3a) Reorder the terms: 8 + -9a = -3(a + 7) + 2(1 + -3a) Reorder the terms: 8 + -9a = -3(7 + a) + 2(1 + -3a) 8 + -9a = (7 * -3 + a * -3) + 2(1 + -3a) 8 + -9a = (-21 + -3a) + 2(1 + -3a) 8 + -9a = -21 + -3a + (1 * 2 + -3a * 2) 8 + -9a = -21 + -3a + (2 + -6a) Reorder the terms: 8 + -9a = -21 + 2 + -3a + -6a Combine like terms: -21 + 2 = -19 8 + -9a = -19 + -3a + -6a Combine like terms: -3a + -6a = -9a 8 + -9a = -19 + -9a Add '9a' to each side of the equation. 8 + -9a + 9a = -19 + -9a + 9a Combine like terms: -9a + 9a = 0 8 + 0 = -19 + -9a + 9a 8 = -19 + -9a + 9a Combine like terms: -9a + 9a = 0 8 = -19 + 0 8 = -19 Solving 8 = -19 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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