(4+8x)/(2x+1)

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Solution for (4+8x)/(2x+1) equation: 


D( x )

2*x+1 = 0

2*x+1 = 0

2*x+1 = 0

2*x+1 = 0 // - 1

2*x = -1 // : 2

x = -1/2

x in (-oo:-1/2) U (-1/2:+oo)

(8*x+4)/(2*x+1) = 0

8*x+4 = 0 // - 4

8*x = -4 // : 8

x = -4/8

x = -1/2

x in { -1/2} 

x belongs to the empty set

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