x/(-3)=-21 - solution

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Solution for x/(-3)=-21 equation:

x in (-oo:+oo)

x/(-3) = -21 // + 21

x/(-3)+21 = 0

21-1/3*x = 0 // - 21

-1/3*x = -21 // : -1/3

x = -21/(-1/3)

x = 63

x = 63

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