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Simplifying -0.2(2.12 + -1b) = 8.6 (2.12 * -0.2 + -1b * -0.2) = 8.6 (-0.424 + 0.2b) = 8.6 Solving -0.424 + 0.2b = 8.6 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '0.424' to each side of the equation. -0.424 + 0.424 + 0.2b = 8.6 + 0.424 Combine like terms: -0.424 + 0.424 = 0.000 0.000 + 0.2b = 8.6 + 0.424 0.2b = 8.6 + 0.424 Combine like terms: 8.6 + 0.424 = 9.024 0.2b = 9.024 Divide each side by '0.2'. b = 45.12 Simplifying b = 45.12
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