(4-x)/(3+x)=16/25

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Solution for (4-x)/(3+x)=16/25 equation: 


D( x )

x+3 = 0

x+3 = 0

x+3 = 0

x+3 = 0 // - 3

x = -3

x in (-oo:-3) U (-3:+oo)

(4-x)/(x+3) = 16/25 // - 16/25

(4-x)/(x+3)-(16/25) = 0

(4-x)/(x+3)-16/25 = 0

(25*(4-x))/(25*(x+3))+(-16*(x+3))/(25*(x+3)) = 0

25*(4-x)-16*(x+3) = 0

52-41*x = 0

(52-41*x)/(25*(x+3)) = 0

(52-41*x)/(25*(x+3)) = 0 // * 25*(x+3)

52-41*x = 0

52-41*x = 0 // - 52

-41*x = -52 // : -41

x = -52/(-41)

x = 52/41

x = 52/41

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