2=31/(x+4)

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Solution for 2=31/(x+4) equation: 


D( x )

x+4 = 0

x+4 = 0

x+4 = 0

x+4 = 0 // - 4

x = -4

x in (-oo:-4) U (-4:+oo)

2 = 31/(x+4) // - 31/(x+4)

2-(31/(x+4)) = 0

2-31*(x+4)^-1 = 0

2-31/(x+4) = 0

(2*(x+4))/(x+4)-31/(x+4) = 0

2*(x+4)-31 = 0

2*x-23 = 0

(2*x-23)/(x+4) = 0

(2*x-23)/(x+4) = 0 // * x+4

2*x-23 = 0

2*x-23 = 0 // + 23

2*x = 23 // : 2

x = 23/2

x = 23/2

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