Verified Answer :

The solution to the proportion X is 30.

cambeachlife

Answer:

x = 30

Step-by-step explanation:

D( x )


x = 0


x = 0


x = 0


x in (-oo:0) U (0:+oo)


4/12 = 10/x // - 10/x


4/12-(10/x) = 0


4/12-10x^-1 = 0


-10x^-1 = -1/3 // : -10


x^-1 = 1/30


-1 < 0


1/(x^1) = 1/30 // x^1


1 = 1/30x^1 // : 1/30


30 = x^1


x = 30


x = 30

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