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2/3(2r+9)-1/3(4r+18)=6
We move all terms to the left:
2/3(2r+9)-1/3(4r+18)-(6)=0
Domain of the equation: 3(2r+9)!=0
r∈R
Domain of the equation: 3(4r+18)!=0We calculate fractions
r∈R
(6r4/(3(2r+9)*3(4r+18))+(-3r2/(3(2r+9)*3(4r+18))-6=0
We can not solve this equation
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