5/7=10/(x+2)

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Solution for 5/7=10/(x+2) equation: 


D( x )

x+2 = 0

x+2 = 0

x+2 = 0

x+2 = 0 // - 2

x = -2

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

5/7 = 10/(x+2) // - 10/(x+2)

5/7-(10/(x+2)) = 0

5/7-10*(x+2)^-1 = 0

5/7-10/(x+2) = 0

(-10*7)/(7*(x+2))+(5*(x+2))/(7*(x+2)) = 0

5*(x+2)-10*7 = 0

5*x-60 = 0

(5*x-60)/(7*(x+2)) = 0

(5*x-60)/(7*(x+2)) = 0 // * 7*(x+2)

5*x-60 = 0

5*x-60 = 0 // + 60

5*x = 60 // : 5

x = 60/5

x = 12

x = 12

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