(2/3)=(x+7)/(3x)

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Solution for (2/3)=(x+7)/(3x) equation: 


D( x )

3*x = 0

3*x = 0

3*x = 0

3*x = 0 // : 3

x = 0

x in (-oo:0) U (0:+oo)

2/3 = (x+7)/(3*x) // - (x+7)/(3*x)

2/3-((x+7)/(3*x)) = 0

(-1*(x+7))/(3*x)+2/3 = 0

(-1*3*(x+7))/(3*3*x)+(2*3*x)/(3*3*x) = 0

2*3*x-1*3*(x+7) = 0

3*x-21 = 0

(3*x-21)/(3*3*x) = 0

(3*x-21)/(3*3*x) = 0 // * 3*3*x

3*x-21 = 0

3*x-21 = 0 // + 21

3*x = 21 // : 3

x = 21/3

x = 7

x = 7

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