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Simplifying 2(12 + y) + 5y = -21 (12 * 2 + y * 2) + 5y = -21 (24 + 2y) + 5y = -21 Combine like terms: 2y + 5y = 7y 24 + 7y = -21 Solving 24 + 7y = -21 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-24' to each side of the equation. 24 + -24 + 7y = -21 + -24 Combine like terms: 24 + -24 = 0 0 + 7y = -21 + -24 7y = -21 + -24 Combine like terms: -21 + -24 = -45 7y = -45 Divide each side by '7'. y = -6.428571429 Simplifying y = -6.428571429
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