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9-19=3b+5b
We move all terms to the left:
9-19-(3b+5b)=0
We add all the numbers together, and all the variables
-(+8b)+9-19=0
We add all the numbers together, and all the variables
-(+8b)-10=0
We get rid of parentheses
-8b-10=0
We move all terms containing b to the left, all other terms to the right
-8b=10
b=10/-8
b=-1+1/4
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