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Simplifying 8y = y + -21 Reorder the terms: 8y = -21 + y Solving 8y = -21 + y Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-1y' to each side of the equation. 8y + -1y = -21 + y + -1y Combine like terms: 8y + -1y = 7y 7y = -21 + y + -1y Combine like terms: y + -1y = 0 7y = -21 + 0 7y = -21 Divide each side by '7'. y = -3 Simplifying y = -3
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