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Simplifying 4b + 9 = 2b + -30 Reorder the terms: 9 + 4b = 2b + -30 Reorder the terms: 9 + 4b = -30 + 2b Solving 9 + 4b = -30 + 2b Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '-2b' to each side of the equation. 9 + 4b + -2b = -30 + 2b + -2b Combine like terms: 4b + -2b = 2b 9 + 2b = -30 + 2b + -2b Combine like terms: 2b + -2b = 0 9 + 2b = -30 + 0 9 + 2b = -30 Add '-9' to each side of the equation. 9 + -9 + 2b = -30 + -9 Combine like terms: 9 + -9 = 0 0 + 2b = -30 + -9 2b = -30 + -9 Combine like terms: -30 + -9 = -39 2b = -39 Divide each side by '2'. b = -19.5 Simplifying b = -19.5
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