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Simplifying 5 + -2(a + -1) = 2a + -1(4a + 7) Reorder the terms: 5 + -2(-1 + a) = 2a + -1(4a + 7) 5 + (-1 * -2 + a * -2) = 2a + -1(4a + 7) 5 + (2 + -2a) = 2a + -1(4a + 7) Combine like terms: 5 + 2 = 7 7 + -2a = 2a + -1(4a + 7) Reorder the terms: 7 + -2a = 2a + -1(7 + 4a) 7 + -2a = 2a + (7 * -1 + 4a * -1) 7 + -2a = 2a + (-7 + -4a) Reorder the terms: 7 + -2a = -7 + 2a + -4a Combine like terms: 2a + -4a = -2a 7 + -2a = -7 + -2a Add '2a' to each side of the equation. 7 + -2a + 2a = -7 + -2a + 2a Combine like terms: -2a + 2a = 0 7 + 0 = -7 + -2a + 2a 7 = -7 + -2a + 2a Combine like terms: -2a + 2a = 0 7 = -7 + 0 7 = -7 Solving 7 = -7 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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