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Simplifying 21 = 3s + 4b Reorder the terms: 21 = 4b + 3s Solving 21 = 4b + 3s Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '-4b' to each side of the equation. 21 + -4b = 4b + -4b + 3s Combine like terms: 4b + -4b = 0 21 + -4b = 0 + 3s 21 + -4b = 3s Add '-21' to each side of the equation. 21 + -21 + -4b = -21 + 3s Combine like terms: 21 + -21 = 0 0 + -4b = -21 + 3s -4b = -21 + 3s Divide each side by '-4'. b = 5.25 + -0.75s Simplifying b = 5.25 + -0.75s
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