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19/r=12/4
We move all terms to the left:
19/r-(12/4)=0
Domain of the equation: r!=0We add all the numbers together, and all the variables
r∈R
19/r-3=0
We multiply all the terms by the denominator
-3*r+19=0
We add all the numbers together, and all the variables
-3r+19=0
We move all terms containing r to the left, all other terms to the right
-3r=-19
r=-19/-3
r=6+1/3
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