-7=a/3

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Solution for -7=a/3 equation: 


a in (-oo:+oo)

-7 = a/3 // - a/3

-(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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