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Simplifying 13b = 2(3b + -12) + 3 Reorder the terms: 13b = 2(-12 + 3b) + 3 13b = (-12 * 2 + 3b * 2) + 3 13b = (-24 + 6b) + 3 Reorder the terms: 13b = -24 + 3 + 6b Combine like terms: -24 + 3 = -21 13b = -21 + 6b Solving 13b = -21 + 6b Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '-6b' to each side of the equation. 13b + -6b = -21 + 6b + -6b Combine like terms: 13b + -6b = 7b 7b = -21 + 6b + -6b Combine like terms: 6b + -6b = 0 7b = -21 + 0 7b = -21 Divide each side by '7'. b = -3 Simplifying b = -3
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