s/(-20)=7 - solution

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Solution for s/(-20)=7 equation:

s in (-oo:+oo)

s/(-20) = 7 // - 7

s/(-20)-7 = 0

-1/20*s-7 = 0 // + 7

-1/20*s = 7 // : -1/20

s = 7/(-1/20)

s = -140

s = -140

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