8/7r-5/4r=1/7

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Solution for 8/7r-5/4r=1/7 equation: 


r in (-oo:+oo)

(8/7)*r-((5/4)*r) = 1/7 // - 1/7

(8/7)*r-((5/4)*r)-(1/7) = 0

(8/7)*r+(-5/4)*r-1/7 = 0

-3/28*r-1/7 = 0 // + 1/7

-3/28*r = 1/7 // : -3/28

r = 1/7/(-3/28)

r = -4/3

r = -4/3

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