15/45=72/a

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Solution for 15/45=72/a equation: 


D( a )

a = 0

a = 0

a = 0

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

15/45 = 72/a // - 72/a

15/45-(72/a) = 0

15/45-72*a^-1 = 0

-72*a^-1 = -1/3 // : -72

a^-1 = 1/216

-1 < 0

1/(a^1) = 1/216 // * a^1

1 = 1/216*a^1 // : 1/216

216 = a^1

a = 216

a = 216

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