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-31/2r=9(5r+8)
We move all terms to the left:
-31/2r-(9(5r+8))=0
Domain of the equation: 2r!=0We multiply all the terms by the denominator
r!=0/2
r!=0
r∈R
-((9(5r+8)))*2r-31=0
We move all terms containing r to the left, all other terms to the right
-((9(5r+8)))*2r=31
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