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Simplifying 7b + 12 = -15 + -2b Reorder the terms: 12 + 7b = -15 + -2b Solving 12 + 7b = -15 + -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 + 7b + 2b = -15 + -2b + 2b Combine like terms: 7b + 2b = 9b 12 + 9b = -15 + -2b + 2b Combine like terms: -2b + 2b = 0 12 + 9b = -15 + 0 12 + 9b = -15 Add '-12' to each side of the equation. 12 + -12 + 9b = -15 + -12 Combine like terms: 12 + -12 = 0 0 + 9b = -15 + -12 9b = -15 + -12 Combine like terms: -15 + -12 = -27 9b = -27 Divide each side by '9'. b = -3 Simplifying b = -3
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