x/(x+7)=8/7

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Solution for x/(x+7)=8/7 equation: 


D( x )

x+7 = 0

x+7 = 0

x+7 = 0

x+7 = 0 // - 7

x = -7

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

x/(x+7) = 8/7 // - 8/7

x/(x+7)-(8/7) = 0

x/(x+7)-8/7 = 0

(7*x)/(7*(x+7))+(-8*(x+7))/(7*(x+7)) = 0

7*x-8*(x+7) = 0

-x-56 = 0

(-x-56)/(7*(x+7)) = 0

(-x-56)/(7*(x+7)) = 0 // * 7*(x+7)

-x-56 = 0

-x-56 = 0 // + 56

-x = 56 // * -1

x = -56

x = -56

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