4/10=x/(x+8)

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Solution for 4/10=x/(x+8) equation: 


D( x )

x+8 = 0

x+8 = 0

x+8 = 0

x+8 = 0 // - 8

x = -8

x in (-oo:-8) U (-8:+oo)

4/10 = x/(x+8) // - x/(x+8)

4/10-(x/(x+8)) = 0

(-1*x)/(x+8)+2/5 = 0

(-1*5*x)/(5*(x+8))+(2*(x+8))/(5*(x+8)) = 0

2*(x+8)-1*5*x = 0

16-3*x = 0

(16-3*x)/(5*(x+8)) = 0

(16-3*x)/(5*(x+8)) = 0 // * 5*(x+8)

16-3*x = 0

16-3*x = 0 // - 16

-3*x = -16 // : -3

x = -16/(-3)

x = 16/3

x = 16/3

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