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Simplifying 21 + -9y = 0 Solving 21 + -9y = 0 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-21' to each side of the equation. 21 + -21 + -9y = 0 + -21 Combine like terms: 21 + -21 = 0 0 + -9y = 0 + -21 -9y = 0 + -21 Combine like terms: 0 + -21 = -21 -9y = -21 Divide each side by '-9'. y = 2.333333333 Simplifying y = 2.333333333
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