(42-7x)/(36-6x)

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Solution for (42-7x)/(36-6x) equation: 


D( x )

36-(6*x) = 0

36-(6*x) = 0

36-(6*x) = 0

36-6*x = 0

36-6*x = 0 // - 36

-6*x = -36 // : -6

x = -36/(-6)

x = 6

x in (-oo:6) U (6:+oo)

(42-(7*x))/(36-(6*x)) = 0

(42-7*x)/(36-6*x) = 0

42-7*x = 0 // - 42

-7*x = -42 // : -7

x = -42/(-7)

x = 6

x in { 6} 

x belongs to the empty set

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