200(1+4/r)=600

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Solution for 200(1+4/r)=600 equation: 



200(1+4/r)=600

We move all terms to the left:

200(1+4/r)-(600)=0



Domain of the equation: r)!=0

r!=0/1

r!=0

r∈R



We add all the numbers together, and all the variables

200(4/r+1)-600=0

We multiply parentheses

800r+200-600=0

We add all the numbers together, and all the variables

800r-400=0

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

800r=400

r=400/800

r=1/2

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