7/(s-14)=21/(s+18)

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Solution for 7/(s-14)=21/(s+18) equation:


D( s )

s+18 = 0

s-14 = 0

s+18 = 0

s+18 = 0

s+18 = 0 // - 18

s = -18

s-14 = 0

s-14 = 0

s-14 = 0 // + 14

s = 14

s in (-oo:-18) U (-18:14) U (14:+oo)

7/(s-14) = 21/(s+18) // - 21/(s+18)

7/(s-14)-(21/(s+18)) = 0

7/(s-14)-21*(s+18)^-1 = 0

7/(s-14)-21/(s+18) = 0

(7*(s+18))/((s-14)*(s+18))+(-21*(s-14))/((s-14)*(s+18)) = 0

7*(s+18)-21*(s-14) = 0

420-14*s = 0

(420-14*s)/((s-14)*(s+18)) = 0

(420-14*s)/((s-14)*(s+18)) = 0 // * (s-14)*(s+18)

420-14*s = 0

420-14*s = 0 // - 420

-14*s = -420 // : -14

s = -420/(-14)

s = 30

s = 30

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