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Simplifying -4x + 7 + 4x = -1 Reorder the terms: 7 + -4x + 4x = -1 Combine like terms: -4x + 4x = 0 7 + 0 = -1 7 = -1 Solving 7 = -1 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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