31/2r=28 - solution

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Solution for 31/2r=28 equation:

r in (-oo:+oo)

(31/2)*r = 28 // - 28

(31/2)*r-28 = 0

31/2*r-28 = 0 // + 28

31/2*r = 28 // : 31/2

r = 28/31/2

r = 56/31

r = 56/31

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