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-2b=+2(b-10)=2(10+5b)
We move all terms to the left:
-2b-(+2(b-10))=0
We calculate terms in parentheses: -(+2(b-10)), so:We get rid of parentheses
+2(b-10)
determiningTheFunctionDomain 2(b-10)
We multiply parentheses
2b-20
Back to the equation:
-(2b-20)
-2b-2b+20=0
We add all the numbers together, and all the variables
-4b+20=0
We move all terms containing b to the left, all other terms to the right
-4b=-20
b=-20/-4
b=+5
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