20/30=5/a

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Solution for 20/30=5/a equation: 


D( a )

a = 0

a = 0

a = 0

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

20/30 = 5/a // - 5/a

20/30-(5/a) = 0

20/30-5*a^-1 = 0

-5*a^-1 = -2/3 // : -5

a^-1 = 2/15

-1 < 0

1/(a^1) = 2/15 // * a^1

1 = 2/15*a^1 // : 2/15

15/2 = a^1

a = 15/2

a = 15/2

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