a/-3=-7

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Solution for a/-3=-7 equation: 


a in (-oo:+oo)

a/(-3) = -7 // + 7

a/(-3)+7 = 0

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

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

a = -7/(-1/3)

a = 21

a = 21

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