2=-1/2r

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Solution for 2=-1/2r equation: 



2=-1/2r

We move all terms to the left:

2-(-1/2r)=0



Domain of the equation: 2r)!=0

r!=0/1

r!=0

r∈R



We get rid of parentheses

1/2r+2=0

We multiply all the terms by the denominator


2*2r+1=0

Wy multiply elements

4r+1=0

We move all terms containing r to the left, all other terms to the right

4r=-1

r=-1/4

r=-1/4

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