-1/2r=20

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Solution for -1/2r=20 equation: 



-1/2r=20

We move all terms to the left:

-1/2r-(20)=0



Domain of the equation: 2r!=0

r!=0/2

r!=0

r∈R



We multiply all the terms by the denominator


-20*2r-1=0

Wy multiply elements

-40r-1=0

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

-40r=1

r=1/-40

r=-1/40

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