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4b-2.4=9
We move all terms to the left:
4b-2.4-(9)=0
We add all the numbers together, and all the variables
4b-11.4=0
We move all terms containing b to the left, all other terms to the right
4b=11.4
b=11.4/4
b=2+2.4285714285714/2.8571428571429
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