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Simplifying 7(3s + 3) = 252 Reorder the terms: 7(3 + 3s) = 252 (3 * 7 + 3s * 7) = 252 (21 + 21s) = 252 Solving 21 + 21s = 252 Solving for variable 's'. Move all terms containing s to the left, all other terms to the right. Add '-21' to each side of the equation. 21 + -21 + 21s = 252 + -21 Combine like terms: 21 + -21 = 0 0 + 21s = 252 + -21 21s = 252 + -21 Combine like terms: 252 + -21 = 231 21s = 231 Divide each side by '21'. s = 11 Simplifying s = 11
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