R-20/-28=4

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Solution for R-20/-28=4 equation: 


R in (-oo:+oo)

R-(20/(-28)) = 4 // - 4

R-(20/(-28))-4 = 0

R+5/7-4 = 0

R-23/7 = 0 // + 23/7

R = 23/7

R = 23/7

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