8/10=9/a

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Solution for 8/10=9/a equation: 


D( a )

a = 0

a = 0

a = 0

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

8/10 = 9/a // - 9/a

8/10-(9/a) = 0

8/10-9*a^-1 = 0

-9*a^-1 = -4/5 // : -9

a^-1 = 4/45

-1 < 0

1/(a^1) = 4/45 // * a^1

1 = 4/45*a^1 // : 4/45

45/4 = a^1

a = 45/4

a = 45/4

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