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Simplifying 8y + 21 = 3y + 7 Reorder the terms: 21 + 8y = 3y + 7 Reorder the terms: 21 + 8y = 7 + 3y Solving 21 + 8y = 7 + 3y Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-3y' to each side of the equation. 21 + 8y + -3y = 7 + 3y + -3y Combine like terms: 8y + -3y = 5y 21 + 5y = 7 + 3y + -3y Combine like terms: 3y + -3y = 0 21 + 5y = 7 + 0 21 + 5y = 7 Add '-21' to each side of the equation. 21 + -21 + 5y = 7 + -21 Combine like terms: 21 + -21 = 0 0 + 5y = 7 + -21 5y = 7 + -21 Combine like terms: 7 + -21 = -14 5y = -14 Divide each side by '5'. y = -2.8 Simplifying y = -2.8
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