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2(1+5b)=7(2b-4)
We move all terms to the left:
2(1+5b)-(7(2b-4))=0
We add all the numbers together, and all the variables
2(5b+1)-(7(2b-4))=0
We multiply parentheses
10b-(7(2b-4))+2=0
We calculate terms in parentheses: -(7(2b-4)), so:We get rid of parentheses
7(2b-4)
We multiply parentheses
14b-28
Back to the equation:
-(14b-28)
10b-14b+28+2=0
We add all the numbers together, and all the variables
-4b+30=0
We move all terms containing b to the left, all other terms to the right
-4b=-30
b=-30/-4
b=7+1/2
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