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Simplifying 123 = -1(2 + -2b) 123 = (2 * -1 + -2b * -1) 123 = (-2 + 2b) Solving 123 = -2 + 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. 123 + -2b = -2 + 2b + -2b Combine like terms: 2b + -2b = 0 123 + -2b = -2 + 0 123 + -2b = -2 Add '-123' to each side of the equation. 123 + -123 + -2b = -2 + -123 Combine like terms: 123 + -123 = 0 0 + -2b = -2 + -123 -2b = -2 + -123 Combine like terms: -2 + -123 = -125 -2b = -125 Divide each side by '-2'. b = 62.5 Simplifying b = 62.5
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