(-7-21a)(-1/3)

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Solution for (-7-21a)(-1/3) equation: 


a in (-oo:+oo)

(-1/3)*(-(21*a)-7) = 0

(-1/3)*(-21*a-7) = 0

-1/3*(-21*a-7) = 0

( -1/3 )

-1/3 = 0

a belongs to the empty set

( -21*a-7 )

-21*a-7 = 0 // + 7

-21*a = 7 // : -21

a = 7/(-21)

a = -1/3

a = -1/3

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