7/X-2/5=1

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Solution for 7/X-2/5=1 equation: 


D( X )

X = 0

X = 0

X = 0

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

7/X-(2/5) = 1 // - 1

7/X-(2/5)-1 = 0

7/X-2/5-1 = 0

7*X^-1 = 7/5 // : 7

X^-1 = 1/5

-1 < 0

1/(X^1) = 1/5 // * X^1

1 = 1/5*X^1 // : 1/5

5 = X^1

X = 5

X = 5

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