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Simplifying 7.8b + -21.4 = 42.7 Reorder the terms: -21.4 + 7.8b = 42.7 Solving -21.4 + 7.8b = 42.7 Solving for variable 'b'. Move all terms containing b to the left, all other terms to the right. Add '21.4' to each side of the equation. -21.4 + 21.4 + 7.8b = 42.7 + 21.4 Combine like terms: -21.4 + 21.4 = 0.0 0.0 + 7.8b = 42.7 + 21.4 7.8b = 42.7 + 21.4 Combine like terms: 42.7 + 21.4 = 64.1 7.8b = 64.1 Divide each side by '7.8'. b = 8.217948718 Simplifying b = 8.217948718
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