-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

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

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

a = 7/(-1/3)

a = -21

a = -21

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