1/2s-4s-21

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Solution for 1/2s-4s-21 equation: 


s in (-oo:+oo)

(1/2)*s-(4*s)-21 = 0

(1/2)*s-4*s-21 = 0

-7/2*s-21 = 0 // + 21

-7/2*s = 21 // : -7/2

s = 21/(-7/2)

s = -6

s = -6

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