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Simplifying 12b + -9 + 2n + -1n = -87 Reorder the terms: -9 + 12b + 2n + -1n = -87 Combine like terms: 2n + -1n = 1n -9 + 12b + 1n = -87 Solving -9 + 12b + 1n = -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 + 12b + 9 + 1n = -87 + 9 Reorder the terms: -9 + 9 + 12b + 1n = -87 + 9 Combine like terms: -9 + 9 = 0 0 + 12b + 1n = -87 + 9 12b + 1n = -87 + 9 Combine like terms: -87 + 9 = -78 12b + 1n = -78 Add '-1n' to each side of the equation. 12b + 1n + -1n = -78 + -1n Combine like terms: 1n + -1n = 0 12b + 0 = -78 + -1n 12b = -78 + -1n Divide each side by '12'. b = -6.5 + -0.08333333333n Simplifying b = -6.5 + -0.08333333333n
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