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Simplifying 7y + -21 = -8y Reorder the terms: -21 + 7y = -8y Solving -21 + 7y = -8y Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '8y' to each side of the equation. -21 + 7y + 8y = -8y + 8y Combine like terms: 7y + 8y = 15y -21 + 15y = -8y + 8y Combine like terms: -8y + 8y = 0 -21 + 15y = 0 Add '21' to each side of the equation. -21 + 21 + 15y = 0 + 21 Combine like terms: -21 + 21 = 0 0 + 15y = 0 + 21 15y = 0 + 21 Combine like terms: 0 + 21 = 21 15y = 21 Divide each side by '15'. y = 1.4 Simplifying y = 1.4
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