R-7/81

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Solution for R-7/81 equation: 


R in (-oo:+oo)

R-(7/8) > 1 // - 1

R-(7/8)-1 > 0

R-7/8-1 > 0

R-15/8 > 0 // + 15/8

R > 15/8

R in (15/8:+oo)

(15/8:+oo)

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