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2.8+0.2b=18
We move all terms to the left:
2.8+0.2b-(18)=0
We add all the numbers together, and all the variables
0.2b-15.2=0
We move all terms containing b to the left, all other terms to the right
0.2b=15.2
b=15.2/0.2
b=75+0.2/0.2
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