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1/2r=5
We move all terms to the left:
1/2r-(5)=0
Domain of the equation: 2r!=0We multiply all the terms by the denominator
r!=0/2
r!=0
r∈R
-5*2r+1=0
Wy multiply elements
-10r+1=0
We move all terms containing r to the left, all other terms to the right
-10r=-1
r=-1/-10
r=1/10
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