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Simplifying 8y + -21 = 2y + -9 Reorder the terms: -21 + 8y = 2y + -9 Reorder the terms: -21 + 8y = -9 + 2y Solving -21 + 8y = -9 + 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 + 8y + -2y = -9 + 2y + -2y Combine like terms: 8y + -2y = 6y -21 + 6y = -9 + 2y + -2y Combine like terms: 2y + -2y = 0 -21 + 6y = -9 + 0 -21 + 6y = -9 Add '21' to each side of the equation. -21 + 21 + 6y = -9 + 21 Combine like terms: -21 + 21 = 0 0 + 6y = -9 + 21 6y = -9 + 21 Combine like terms: -9 + 21 = 12 6y = 12 Divide each side by '6'. y = 2 Simplifying y = 2
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