45/(11-4x)+7=12

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Solution for 45/(11-4x)+7=12 equation: 


D( x )

11-(4*x) = 0

11-(4*x) = 0

11-(4*x) = 0

11-4*x = 0

11-4*x = 0 // - 11

-4*x = -11 // : -4

x = -11/(-4)

x = 11/4

x in (-oo:11/4) U (11/4:+oo)

45/(11-(4*x))+7 = 12 // - 12

45/(11-(4*x))-12+7 = 0

45/(11-4*x)-12+7 = 0

45/(11-4*x)+(-12*(11-4*x))/(11-4*x)+(7*(11-4*x))/(11-4*x) = 0

7*(11-4*x)-12*(11-4*x)+45 = 0

48*x-28*x-87+77 = 0

20*x-10 = 0

(20*x-10)/(11-4*x) = 0

(20*x-10)/(11-4*x) = 0 // * 11-4*x

20*x-10 = 0

20*x-10 = 0 // + 10

20*x = 10 // : 20

x = 10/20

x = 1/2

x = 1/2

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