3/5=7/a

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Solution for 3/5=7/a equation: 


D( a )

a = 0

a = 0

a = 0

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

3/5 = 7/a // - 7/a

3/5-(7/a) = 0

3/5-7*a^-1 = 0

-7*a^-1 = -3/5 // : -7

a^-1 = 3/35

-1 < 0

1/(a^1) = 3/35 // * a^1

1 = 3/35*a^1 // : 3/35

35/3 = a^1

a = 35/3

a = 35/3

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