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