12/(u+7)=6/5

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Solution for 12/(u+7)=6/5 equation: 


D( u )

u+7 = 0

u+7 = 0

u+7 = 0

u+7 = 0 // - 7

u = -7

u in (-oo:-7) U (-7:+oo)

12/(u+7) = 6/5 // - 6/5

12/(u+7)-(6/5) = 0

12/(u+7)-6/5 = 0

(5*12)/(5*(u+7))+(-6*(u+7))/(5*(u+7)) = 0

5*12-6*(u+7) = 0

18-6*u = 0

(18-6*u)/(5*(u+7)) = 0

(18-6*u)/(5*(u+7)) = 0 // * 5*(u+7)

18-6*u = 0

18-6*u = 0 // - 18

-6*u = -18 // : -6

u = -18/(-6)

u = 3

u = 3

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