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Simplifying 21 + 5y = -2y Solving 21 + 5y = -2y Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '2y' to each side of the equation. 21 + 5y + 2y = -2y + 2y Combine like terms: 5y + 2y = 7y 21 + 7y = -2y + 2y Combine like terms: -2y + 2y = 0 21 + 7y = 0 Add '-21' to each side of the equation. 21 + -21 + 7y = 0 + -21 Combine like terms: 21 + -21 = 0 0 + 7y = 0 + -21 7y = 0 + -21 Combine like terms: 0 + -21 = -21 7y = -21 Divide each side by '7'. y = -3 Simplifying y = -3
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