40=(339+34x)/(7+x)

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Solution for 40=(339+34x)/(7+x) 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)

40 = (34*x+339)/(x+7) // - (34*x+339)/(x+7)

40-((34*x+339)/(x+7)) = 0

(-1*(34*x+339))/(x+7)+40 = 0

(-1*(34*x+339))/(x+7)+(40*(x+7))/(x+7) = 0

40*(x+7)-1*(34*x+339) = 0

6*x-59 = 0

(6*x-59)/(x+7) = 0

(6*x-59)/(x+7) = 0 // * x+7

6*x-59 = 0

6*x-59 = 0 // + 59

6*x = 59 // : 6

x = 59/6

x = 59/6

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