42/35=18/X

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Solution for 42/35=18/X equation: 


D( X )

X = 0

X = 0

X = 0

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

42/35 = 18/X // - 18/X

42/35-(18/X) = 0

42/35-18*X^-1 = 0

-18*X^-1 = -6/5 // : -18

X^-1 = 1/15

-1 < 0

1/(X^1) = 1/15 // * X^1

1 = 1/15*X^1 // : 1/15

15 = X^1

X = 15

X = 15

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