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3-1/2r=13
We move all terms to the left:
3-1/2r-(13)=0
Domain of the equation: 2r!=0We add all the numbers together, and all the variables
r!=0/2
r!=0
r∈R
-1/2r-10=0
We multiply all the terms by the denominator
-10*2r-1=0
Wy multiply elements
-20r-1=0
We move all terms containing r to the left, all other terms to the right
-20r=1
r=1/-20
r=-1/20
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