0.9(0.5b=0.8)-0.4(0.6b+1.8)=0.21b

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Solution for 0.9(0.5b=0.8)-0.4(0.6b+1.8)=0.21b equation: 



0.9(0.5b=0.8)-0.4(0.6b+1.8)=0.21b

We move all terms to the left:

0.9(0.5b-(0.8)-0.4(0.6b+1.8))=0

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