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Simplifying -7y = 9(-1y + 9) + 2y Reorder the terms: -7y = 9(9 + -1y) + 2y -7y = (9 * 9 + -1y * 9) + 2y -7y = (81 + -9y) + 2y Combine like terms: -9y + 2y = -7y -7y = 81 + -7y Add '7y' to each side of the equation. -7y + 7y = 81 + -7y + 7y Combine like terms: -7y + 7y = 0 0 = 81 + -7y + 7y Combine like terms: -7y + 7y = 0 0 = 81 + 0 0 = 81 Solving 0 = 81 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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