5=(7x+1000)/(1000+x)

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Solution for 5=(7x+1000)/(1000+x) equation: 


D( x )

x+1000 = 0

x+1000 = 0

x+1000 = 0

x+1000 = 0 // - 1000

x = -1000

x in (-oo:-1000) U (-1000:+oo)

5 = (7*x+1000)/(x+1000) // - (7*x+1000)/(x+1000)

5-((7*x+1000)/(x+1000)) = 0

(-1*(7*x+1000))/(x+1000)+5 = 0

(-1*(7*x+1000))/(x+1000)+(5*(x+1000))/(x+1000) = 0

5*(x+1000)-1*(7*x+1000) = 0

4000-2*x = 0

(4000-2*x)/(x+1000) = 0

(4000-2*x)/(x+1000) = 0 // * x+1000

4000-2*x = 0

4000-2*x = 0 // - 4000

-2*x = -4000 // : -2

x = -4000/(-2)

x = 2000

x = 2000

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