s+21/2s+20=55 - solution

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Solution for s+21/2s+20=55 equation:

s in (-oo:+oo)

s+(21/2)*s+20 = 55 // - 55

s+(21/2)*s-55+20 = 0

23/2*s-35 = 0 // + 35

23/2*s = 35 // : 23/2

s = 35/23/2

s = 70/23

s = 70/23

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