2/5(r-2)=2/20(r-4)

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Solution for 2/5(r-2)=2/20(r-4) equation: 


r in (-oo:+oo)

(2/5)*(r-2) = (2/20)*(r-4) // - (2/20)*(r-4)

(2/5)*(r-2)-((2/20)*(r-4)) = 0

(2/5)*(r-2)+(-1/10)*(r-4) = 0

2/5*(r-2)-1/10*(r-4) = 0

2/5*(r-2)-1/10*(r-4) = 0

3/10*r-2/5 = 0

3/10*r-2/5 = 0

3/10*r-2/5 = 0 // + 2/5

3/10*r = 2/5 // : 3/10

r = 2/5/3/10

r = 4/3

r = 4/3

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