9/a=12/20

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Solution for 9/a=12/20 equation: 


D( a )

a = 0

a = 0

a = 0

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

9/a = 12/20 // - 12/20

9/a-(12/20) = 0

9/a-3/5 = 0

9*a^-1 = 3/5 // : 9

a^-1 = 1/15

-1 < 0

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

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

15 = a^1

a = 15

a = 15

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