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4.2b+12.6-3.6=5+6.5
We move all terms to the left:
4.2b+12.6-3.6-(5+6.5)=0
We add all the numbers together, and all the variables
4.2b+12.6-3.6-(11.5)=0
We add all the numbers together, and all the variables
4.2b-2.5=0
We move all terms containing b to the left, all other terms to the right
4.2b=2.5
b=2.5/4.2
b=1/1.68
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