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5b-b+4+10b-7=7*11
We move all terms to the left:
5b-b+4+10b-7-(7*11)=0
We add all the numbers together, and all the variables
5b-b+10b+4-7-77=0
We add all the numbers together, and all the variables
14b-80=0
We move all terms containing b to the left, all other terms to the right
14b=80
b=80/14
b=5+5/7
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