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Simplifying 12 = 3 + -2b Solving 12 = 3 + -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. 12 + 2b = 3 + -2b + 2b Combine like terms: -2b + 2b = 0 12 + 2b = 3 + 0 12 + 2b = 3 Add '-12' to each side of the equation. 12 + -12 + 2b = 3 + -12 Combine like terms: 12 + -12 = 0 0 + 2b = 3 + -12 2b = 3 + -12 Combine like terms: 3 + -12 = -9 2b = -9 Divide each side by '2'. b = -4.5 Simplifying b = -4.5
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