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Simplifying -15 + 7y = -2(-15 + y) -15 + 7y = (-15 * -2 + y * -2) -15 + 7y = (30 + -2y) Solving -15 + 7y = 30 + -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. -15 + 7y + 2y = 30 + -2y + 2y Combine like terms: 7y + 2y = 9y -15 + 9y = 30 + -2y + 2y Combine like terms: -2y + 2y = 0 -15 + 9y = 30 + 0 -15 + 9y = 30 Add '15' to each side of the equation. -15 + 15 + 9y = 30 + 15 Combine like terms: -15 + 15 = 0 0 + 9y = 30 + 15 9y = 30 + 15 Combine like terms: 30 + 15 = 45 9y = 45 Divide each side by '9'. y = 5 Simplifying y = 5
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