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71b+30=85b+16
We move all terms to the left:
71b+30-(85b+16)=0
We get rid of parentheses
71b-85b-16+30=0
We add all the numbers together, and all the variables
-14b+14=0
We move all terms containing b to the left, all other terms to the right
-14b=-14
b=-14/-14
b=1
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