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Simplifying -2(y + 1) + 5 = 21 Reorder the terms: -2(1 + y) + 5 = 21 (1 * -2 + y * -2) + 5 = 21 (-2 + -2y) + 5 = 21 Reorder the terms: -2 + 5 + -2y = 21 Combine like terms: -2 + 5 = 3 3 + -2y = 21 Solving 3 + -2y = 21 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-3' to each side of the equation. 3 + -3 + -2y = 21 + -3 Combine like terms: 3 + -3 = 0 0 + -2y = 21 + -3 -2y = 21 + -3 Combine like terms: 21 + -3 = 18 -2y = 18 Divide each side by '-2'. y = -9 Simplifying y = -9
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