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9=5/2r+3
We move all terms to the left:
9-(5/2r+3)=0
Domain of the equation: 2r+3)!=0We get rid of parentheses
r∈R
-5/2r-3+9=0
We multiply all the terms by the denominator
-3*2r+9*2r-5=0
Wy multiply elements
-6r+18r-5=0
We add all the numbers together, and all the variables
12r-5=0
We move all terms containing r to the left, all other terms to the right
12r=5
r=5/12
r=5/12
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