-4/(2-7x)=3

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Solution for -4/(2-7x)=3 equation: 


D( x )

2-(7*x) = 0

2-(7*x) = 0

2-(7*x) = 0

2-7*x = 0

2-7*x = 0 // - 2

-7*x = -2 // : -7

x = -2/(-7)

x = 2/7

x in (-oo:2/7) U (2/7:+oo)

-4/(2-(7*x)) = 3 // - 3

-4/(2-(7*x))-3 = 0

-4/(2-7*x)-3 = 0

(-3*(2-7*x))/(2-7*x)-4/(2-7*x) = 0

-3*(2-7*x)-4 = 0

21*x-10 = 0

(21*x-10)/(2-7*x) = 0

(21*x-10)/(2-7*x) = 0 // * 2-7*x

21*x-10 = 0

21*x-10 = 0 // + 10

21*x = 10 // : 21

x = 10/21

x = 10/21

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