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10-b=7b-7.4
We move all terms to the left:
10-b-(7b-7.4)=0
We add all the numbers together, and all the variables
-1b-(7b-7.4)+10=0
We get rid of parentheses
-1b-7b+7.4+10=0
We add all the numbers together, and all the variables
-8b+17.4=0
We move all terms containing b to the left, all other terms to the right
-8b=-17.4
b=-17.4/-8
b=2+1/5.7142857142857
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