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0.2b-1.8=-2.6
We move all terms to the left:
0.2b-1.8-(-2.6)=0
We add all the numbers together, and all the variables
0.2b+0.8=0
We move all terms containing b to the left, all other terms to the right
0.2b=-0.8
b=-0.8/0.2
b=-4
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