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Simplifying 4x + 51 + -4x + 31 = 90 Reorder the terms: 51 + 31 + 4x + -4x = 90 Combine like terms: 51 + 31 = 82 82 + 4x + -4x = 90 Combine like terms: 4x + -4x = 0 82 + 0 = 90 82 = 90 Solving 82 = 90 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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