13=9/r+8

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Solution for 13=9/r+8 equation:



13=9/r+8
We move all terms to the left:
13-(9/r+8)=0
Domain of the equation: r+8)!=0
r∈R
We get rid of parentheses
-9/r-8+13=0
We multiply all the terms by the denominator
-8*r+13*r-9=0
We add all the numbers together, and all the variables
5r-9=0
We move all terms containing r to the left, all other terms to the right
5r=9
r=9/5
r=1+4/5

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