7/d+5=10/d+2

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Solution for 7/d+5=10/d+2 equation: 


D( d )

d = 0

d = 0

d = 0

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

7/d+5 = 10/d+2 // - 10/d+2

7/d-(10/d)-2+5 = 0

7/d-10*d^-1-2+5 = 0

-3*d^-1 = -3 // : -3

d^-1 = 1

-1 < 0

1/(d^1) = 1 // * d^1

1 = 1*d^1 // : 1

1 = d^1

d = 1

d = 1

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