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Simplifying 12b + -9 + 2n + -1b = -87 Reorder the terms: -9 + 12b + -1b + 2n = -87 Combine like terms: 12b + -1b = 11b -9 + 11b + 2n = -87 Solving -9 + 11b + 2n = -87 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '9' to each side of the equation. -9 + 11b + 9 + 2n = -87 + 9 Reorder the terms: -9 + 9 + 11b + 2n = -87 + 9 Combine like terms: -9 + 9 = 0 0 + 11b + 2n = -87 + 9 11b + 2n = -87 + 9 Combine like terms: -87 + 9 = -78 11b + 2n = -78 Add '-2n' to each side of the equation. 11b + 2n + -2n = -78 + -2n Combine like terms: 2n + -2n = 0 11b + 0 = -78 + -2n 11b = -78 + -2n Divide each side by '11'. b = -7.090909091 + -0.1818181818n Simplifying b = -7.090909091 + -0.1818181818n
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