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Simplifying 4y + 7 = 4y + -9 Reorder the terms: 7 + 4y = 4y + -9 Reorder the terms: 7 + 4y = -9 + 4y Add '-4y' to each side of the equation. 7 + 4y + -4y = -9 + 4y + -4y Combine like terms: 4y + -4y = 0 7 + 0 = -9 + 4y + -4y 7 = -9 + 4y + -4y Combine like terms: 4y + -4y = 0 7 = -9 + 0 7 = -9 Solving 7 = -9 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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