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Simplifying (9 + -2y) + 2y = 13 Remove parenthesis around (9 + -2y) 9 + -2y + 2y = 13 Combine like terms: -2y + 2y = 0 9 + 0 = 13 9 = 13 Solving 9 = 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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