3/4=12/(x-5)

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Solution for 3/4=12/(x-5) equation:


D( x )

x-5 = 0

x-5 = 0

x-5 = 0

x-5 = 0 // + 5

x = 5

x in (-oo:5) U (5:+oo)

3/4 = 12/(x-5) // - 12/(x-5)

3/4-(12/(x-5)) = 0

3/4-12*(x-5)^-1 = 0

3/4-12/(x-5) = 0

(-12*4)/(4*(x-5))+(3*(x-5))/(4*(x-5)) = 0

3*(x-5)-12*4 = 0

3*x-63 = 0

(3*x-63)/(4*(x-5)) = 0

(3*x-63)/(4*(x-5)) = 0 // * 4*(x-5)

3*x-63 = 0

3*x-63 = 0 // + 63

3*x = 63 // : 3

x = 63/3

x = 21

x = 21

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