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Simplifying -8y + 21 = -4y + -18 Reorder the terms: 21 + -8y = -4y + -18 Reorder the terms: 21 + -8y = -18 + -4y Solving 21 + -8y = -18 + -4y Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '4y' to each side of the equation. 21 + -8y + 4y = -18 + -4y + 4y Combine like terms: -8y + 4y = -4y 21 + -4y = -18 + -4y + 4y Combine like terms: -4y + 4y = 0 21 + -4y = -18 + 0 21 + -4y = -18 Add '-21' to each side of the equation. 21 + -21 + -4y = -18 + -21 Combine like terms: 21 + -21 = 0 0 + -4y = -18 + -21 -4y = -18 + -21 Combine like terms: -18 + -21 = -39 -4y = -39 Divide each side by '-4'. y = 9.75 Simplifying y = 9.75
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