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5/7b+6=21
We move all terms to the left:
5/7b+6-(21)=0
Domain of the equation: 7b!=0We add all the numbers together, and all the variables
b!=0/7
b!=0
b∈R
5/7b-15=0
We multiply all the terms by the denominator
-15*7b+5=0
Wy multiply elements
-105b+5=0
We move all terms containing b to the left, all other terms to the right
-105b=-5
b=-5/-105
b=1/21
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