70/20=35/a

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Solution for 70/20=35/a equation: 


D( a )

a = 0

a = 0

a = 0

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

70/20 = 35/a // - 35/a

70/20-(35/a) = 0

70/20-35*a^-1 = 0

-35*a^-1 = -7/2 // : -35

a^-1 = 1/10

-1 < 0

1/(a^1) = 1/10 // * a^1

1 = 1/10*a^1 // : 1/10

10 = a^1

a = 10

a = 10

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