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Simplifying 7a + -2(a + 1) = 5a + -13 Reorder the terms: 7a + -2(1 + a) = 5a + -13 7a + (1 * -2 + a * -2) = 5a + -13 7a + (-2 + -2a) = 5a + -13 Reorder the terms: -2 + 7a + -2a = 5a + -13 Combine like terms: 7a + -2a = 5a -2 + 5a = 5a + -13 Reorder the terms: -2 + 5a = -13 + 5a Add '-5a' to each side of the equation. -2 + 5a + -5a = -13 + 5a + -5a Combine like terms: 5a + -5a = 0 -2 + 0 = -13 + 5a + -5a -2 = -13 + 5a + -5a Combine like terms: 5a + -5a = 0 -2 = -13 + 0 -2 = -13 Solving -2 = -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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