1/5(3/1r-4/1)=2/5

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Solution for 1/5(3/1r-4/1)=2/5 equation: 


r in (-oo:+oo)

(1/5)*((3/1)*r-(4/1)) = 2/5 // - 2/5

(1/5)*((3/1)*r-(4/1))-(2/5) = 0

(1/5)*(3*r-4)-2/5 = 0

1/5*(3*r-4)-2/5 = 0

(1/5*5*(3*r-4))/5-2/5 = 0

1/5*5*(3*r-4)-2 = 0

3*r-6 = 0

(3*r-6)/5 = 0

(3*r-6)/5 = 0 // * 5

3*r-6 = 0

3*r-6 = 0 // + 6

3*r = 6 // : 3

r = 6/3

r = 2

r = 2

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