7/(x+9/28)=20

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Solution for 7/(x+9/28)=20 equation: 


D( x )

x+9/28 = 0

x+9/28 = 0

x+9/28 = 0

x+9/28 = 0 // - 9/28

x = -9/28

x in (-oo:-9/28) U (-9/28:+oo)

7/(x+9/28) = 20 // - 20

7/(x+9/28)-20 = 0

7/(x+9/28)+(-20*(x+9/28))/(x+9/28) = 0

7-20*(x+9/28) = 0

4/7-20*x = 0

(4/7-20*x)/(x+9/28) = 0

(4/7-20*x)/(x+9/28) = 0 // * x+9/28

4/7-20*x = 0

4/7-20*x = 0 // - 4/7

-20*x = -4/7 // : -20

x = -4/7/(-20)

x = 1/35

x = 1/35

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