(3a/7)/(b/21)

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Solution for (3a/7)/(b/21) equation: 


D( x )

b/21 = 0

b/21 = 0

b/21 = 0

1/21*b = 0

x należy do R

x belongs to the empty set

((3*a)/7)/(b/21) = 0

x belongs to the empty set

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