-3=a/13

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Solution for -3=a/13 equation: 


a in (-oo:+oo)

-3 = a/13 // - a/13

-(a/13)-3 = 0

-1/13*a-3 = 0 // + 3

-1/13*a = 3 // : -1/13

a = 3/(-1/13)

a = -39

a = -39

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