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0.04+13=0.4b-8.6
We move all terms to the left:
0.04+13-(0.4b-8.6)=0
We add all the numbers together, and all the variables
-(0.4b-8.6)+13.04=0
We get rid of parentheses
-0.4b+8.6+13.04=0
We add all the numbers together, and all the variables
-0.4b+21.64=0
We move all terms containing b to the left, all other terms to the right
-0.4b=-21.64
b=-21.64/-0.4
b=54+0.04/0.4
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