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Simplifying -1y * y + 7 = -1y * y Multiply y * y -1y2 + 7 = -1y * y Reorder the terms: 7 + -1y2 = -1y * y Multiply y * y 7 + -1y2 = -1y2 Add 'y2' to each side of the equation. 7 + -1y2 + y2 = -1y2 + y2 Combine like terms: -1y2 + y2 = 0 7 + 0 = -1y2 + y2 7 = -1y2 + y2 Combine like terms: -1y2 + y2 = 0 7 = 0 Solving 7 = 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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