4/5r=-4

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Solution for 4/5r=-4 equation: 



4/5r=-4

We move all terms to the left:

4/5r-(-4)=0



Domain of the equation: 5r!=0

r!=0/5

r!=0

r∈R



We add all the numbers together, and all the variables

4/5r+4=0

We multiply all the terms by the denominator


4*5r+4=0

Wy multiply elements

20r+4=0

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

20r=-4

r=-4/20

r=-1/5

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