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Simplifying 19a = -9a + -7(-4a + 6) Reorder the terms: 19a = -9a + -7(6 + -4a) 19a = -9a + (6 * -7 + -4a * -7) 19a = -9a + (-42 + 28a) Reorder the terms: 19a = -42 + -9a + 28a Combine like terms: -9a + 28a = 19a 19a = -42 + 19a Add '-19a' to each side of the equation. 19a + -19a = -42 + 19a + -19a Combine like terms: 19a + -19a = 0 0 = -42 + 19a + -19a Combine like terms: 19a + -19a = 0 0 = -42 + 0 0 = -42 Solving 0 = -42 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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