5/12=10/(x+3)

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Solution for 5/12=10/(x+3) 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)

5/12 = 10/(x+3) // - 10/(x+3)

5/12-(10/(x+3)) = 0

5/12-10*(x+3)^-1 = 0

5/12-10/(x+3) = 0

(-10*12)/(12*(x+3))+(5*(x+3))/(12*(x+3)) = 0

5*(x+3)-10*12 = 0

5*x-105 = 0

(5*x-105)/(12*(x+3)) = 0

(5*x-105)/(12*(x+3)) = 0 // * 12*(x+3)

5*x-105 = 0

5*x-105 = 0 // + 105

5*x = 105 // : 5

x = 105/5

x = 21

x = 21

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