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Simplifying 9b + -4 = 7b Reorder the terms: -4 + 9b = 7b Solving -4 + 9b = 7b Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '-7b' to each side of the equation. -4 + 9b + -7b = 7b + -7b Combine like terms: 9b + -7b = 2b -4 + 2b = 7b + -7b Combine like terms: 7b + -7b = 0 -4 + 2b = 0 Add '4' to each side of the equation. -4 + 4 + 2b = 0 + 4 Combine like terms: -4 + 4 = 0 0 + 2b = 0 + 4 2b = 0 + 4 Combine like terms: 0 + 4 = 4 2b = 4 Divide each side by '2'. b = 2 Simplifying b = 2
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