(4x-50)/(5x-50)=7/9

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Solution for (4x-50)/(5x-50)=7/9 equation: 


D( x )

5*x-50 = 0

5*x-50 = 0

5*x-50 = 0

5*x-50 = 0 // + 50

5*x = 50 // : 5

x = 50/5

x = 10

x in (-oo:10) U (10:+oo)

(4*x-50)/(5*x-50) = 7/9 // - 7/9

(4*x-50)/(5*x-50)-(7/9) = 0

(4*x-50)/(5*x-50)-7/9 = 0

(9*(4*x-50))/(9*(5*x-50))+(-7*(5*x-50))/(9*(5*x-50)) = 0

9*(4*x-50)-7*(5*x-50) = 0

x-100 = 0

(x-100)/(9*(5*x-50)) = 0

(x-100)/(9*(5*x-50)) = 0 // * 9*(5*x-50)

x-100 = 0

x-100 = 0 // + 100

x = 100

x = 100

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