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1/7r=10
We move all terms to the left:
1/7r-(10)=0
Domain of the equation: 7r!=0We multiply all the terms by the denominator
r!=0/7
r!=0
r∈R
-10*7r+1=0
Wy multiply elements
-70r+1=0
We move all terms containing r to the left, all other terms to the right
-70r=-1
r=-1/-70
r=1/70
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