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Simplifying 8 + -7y = 90 + -21y Solving 8 + -7y = 90 + -21y Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '21y' to each side of the equation. 8 + -7y + 21y = 90 + -21y + 21y Combine like terms: -7y + 21y = 14y 8 + 14y = 90 + -21y + 21y Combine like terms: -21y + 21y = 0 8 + 14y = 90 + 0 8 + 14y = 90 Add '-8' to each side of the equation. 8 + -8 + 14y = 90 + -8 Combine like terms: 8 + -8 = 0 0 + 14y = 90 + -8 14y = 90 + -8 Combine like terms: 90 + -8 = 82 14y = 82 Divide each side by '14'. y = 5.857142857 Simplifying y = 5.857142857
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