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