(63-9x)/(x+3)

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Solution for (63-9x)/(x+3) equation: 


D( x )

x+3 = 0

x+3 = 0

x+3 = 0

x+3 = 0 // - 3

x = -3

x in (-oo:-3) U (-3:+oo)

(63-(9*x))/(x+3) = 0

(63-9*x)/(x+3) = 0

63-9*x = 0 // - 63

-9*x = -63 // : -9

x = -63/(-9)

x = 7

x = 7

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