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5/4b=18
We move all terms to the left:
5/4b-(18)=0
Domain of the equation: 4b!=0We multiply all the terms by the denominator
b!=0/4
b!=0
b∈R
-18*4b+5=0
Wy multiply elements
-72b+5=0
We move all terms containing b to the left, all other terms to the right
-72b=-5
b=-5/-72
b=5/72
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