(19.7-r)/r=-3

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Solution for (19.7-r)/r=-3 equation: 



(19.7-r)/r=-3

We move all terms to the left:

(19.7-r)/r-(-3)=0



Domain of the equation: r!=0

r∈R



We add all the numbers together, and all the variables

(-1r+19.7)/r-(-3)=0

We add all the numbers together, and all the variables

(-1r+19.7)/r+3=0

We multiply all the terms by the denominator


(-1r+19.7)+3*r=0

We add all the numbers together, and all the variables

3r+(-1r+19.7)=0

We get rid of parentheses

3r-1r+19.7=0

We add all the numbers together, and all the variables

2r+19.7=0

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

2r=-19.7

r=-19.7/2

r=-9+1/1.1764705882353

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