8=r/7

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Solution for 8=r/7 equation: 


r in (-oo:+oo)

8 = r/7 // - r/7

8-(r/7) = 0

8-1/7*r = 0 // - 8

-1/7*r = -8 // : -1/7

r = -8/(-1/7)

r = 56

r = 56

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