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Simplifying 7y + 28 = 9(y + 4) Reorder the terms: 28 + 7y = 9(y + 4) Reorder the terms: 28 + 7y = 9(4 + y) 28 + 7y = (4 * 9 + y * 9) 28 + 7y = (36 + 9y) Solving 28 + 7y = 36 + 9y Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-9y' to each side of the equation. 28 + 7y + -9y = 36 + 9y + -9y Combine like terms: 7y + -9y = -2y 28 + -2y = 36 + 9y + -9y Combine like terms: 9y + -9y = 0 28 + -2y = 36 + 0 28 + -2y = 36 Add '-28' to each side of the equation. 28 + -28 + -2y = 36 + -28 Combine like terms: 28 + -28 = 0 0 + -2y = 36 + -28 -2y = 36 + -28 Combine like terms: 36 + -28 = 8 -2y = 8 Divide each side by '-2'. y = -4 Simplifying y = -4
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