(20+4x)/(4+2x)

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Solution for (20+4x)/(4+2x) equation: 


D( x )

2*x+4 = 0

2*x+4 = 0

2*x+4 = 0

2*x+4 = 0 // - 4

2*x = -4 // : 2

x = -4/2

x = -2

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

(4*x+20)/(2*x+4) = 0

4*x+20 = 0 // - 20

4*x = -20 // : 4

x = -20/4

x = -5

x = -5

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