4/5r-1r=-2/5

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


r in (-oo:+oo)

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

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

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

2/5-1/5*r = 0 // - 2/5

-1/5*r = -2/5 // : -1/5

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

r = 2

r = 2

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