12=-4/5r

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Solution for 12=-4/5r equation: 



12=-4/5r

We move all terms to the left:

12-(-4/5r)=0



Domain of the equation: 5r)!=0

r!=0/1

r!=0

r∈R



We get rid of parentheses

4/5r+12=0

We multiply all the terms by the denominator


12*5r+4=0

Wy multiply elements

60r+4=0

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

60r=-4

r=-4/60

r=-1/15

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