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Simplifying 6b + -21 = 0 Reorder the terms: -21 + 6b = 0 Solving -21 + 6b = 0 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '21' to each side of the equation. -21 + 21 + 6b = 0 + 21 Combine like terms: -21 + 21 = 0 0 + 6b = 0 + 21 6b = 0 + 21 Combine like terms: 0 + 21 = 21 6b = 21 Divide each side by '6'. b = 3.5 Simplifying b = 3.5
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