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5/6b=420
We move all terms to the left:
5/6b-(420)=0
Domain of the equation: 6b!=0We multiply all the terms by the denominator
b!=0/6
b!=0
b∈R
-420*6b+5=0
Wy multiply elements
-2520b+5=0
We move all terms containing b to the left, all other terms to the right
-2520b=-5
b=-5/-2520
b=1/504
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