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2/5r=60
We move all terms to the left:
2/5r-(60)=0
Domain of the equation: 5r!=0We multiply all the terms by the denominator
r!=0/5
r!=0
r∈R
-60*5r+2=0
Wy multiply elements
-300r+2=0
We move all terms containing r to the left, all other terms to the right
-300r=-2
r=-2/-300
r=1/150
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