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Simplifying x + (15 + -1x) = 550 Remove parenthesis around (15 + -1x) x + 15 + -1x = 550 Reorder the terms: 15 + x + -1x = 550 Combine like terms: x + -1x = 0 15 + 0 = 550 15 = 550 Solving 15 = 550 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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