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Simplifying y + (y + 3) + (y + 5) + (y + 8) = 21 Reorder the terms: y + (3 + y) + (y + 5) + (y + 8) = 21 Remove parenthesis around (3 + y) y + 3 + y + (y + 5) + (y + 8) = 21 Reorder the terms: y + 3 + y + (5 + y) + (y + 8) = 21 Remove parenthesis around (5 + y) y + 3 + y + 5 + y + (y + 8) = 21 Reorder the terms: y + 3 + y + 5 + y + (8 + y) = 21 Remove parenthesis around (8 + y) y + 3 + y + 5 + y + 8 + y = 21 Reorder the terms: 3 + 5 + 8 + y + y + y + y = 21 Combine like terms: 3 + 5 = 8 8 + 8 + y + y + y + y = 21 Combine like terms: 8 + 8 = 16 16 + y + y + y + y = 21 Combine like terms: y + y = 2y 16 + 2y + y + y = 21 Combine like terms: 2y + y = 3y 16 + 3y + y = 21 Combine like terms: 3y + y = 4y 16 + 4y = 21 Solving 16 + 4y = 21 Solving for variable 'y'. Move all terms containing y to the left, all other terms to the right. Add '-16' to each side of the equation. 16 + -16 + 4y = 21 + -16 Combine like terms: 16 + -16 = 0 0 + 4y = 21 + -16 4y = 21 + -16 Combine like terms: 21 + -16 = 5 4y = 5 Divide each side by '4'. y = 1.25 Simplifying y = 1.25
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