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Simplifying 3y + 21 = 3y + -6 Reorder the terms: 21 + 3y = 3y + -6 Reorder the terms: 21 + 3y = -6 + 3y Add '-3y' to each side of the equation. 21 + 3y + -3y = -6 + 3y + -3y Combine like terms: 3y + -3y = 0 21 + 0 = -6 + 3y + -3y 21 = -6 + 3y + -3y Combine like terms: 3y + -3y = 0 21 = -6 + 0 21 = -6 Solving 21 = -6 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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