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Simplifying y + (10 + -1y) + -20 = 0 Remove parenthesis around (10 + -1y) y + 10 + -1y + -20 = 0 Reorder the terms: 10 + -20 + y + -1y = 0 Combine like terms: 10 + -20 = -10 -10 + y + -1y = 0 Combine like terms: y + -1y = 0 -10 + 0 = 0 -10 = 0 Solving -10 = 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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