30/50=18/j

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Solution for 30/50=18/j equation: 


D( j )

j = 0

j = 0

j = 0

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

30/50 = 18/j // - 18/j

30/50-(18/j) = 0

30/50-18*j^-1 = 0

-18*j^-1 = -3/5 // : -18

j^-1 = 1/30

-1 < 0

1/(j^1) = 1/30 // * j^1

1 = 1/30*j^1 // : 1/30

30 = j^1

j = 30

j = 30

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