a/-2+4=13

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Solution for a/-2+4=13 equation: 


a in (-oo:+oo)

a/(-2)+4 = 13 // - 13

a/(-2)-13+4 = 0

-1/2*a-9 = 0 // + 9

-1/2*a = 9 // : -1/2

a = 9/(-1/2)

a = -18

a = -18

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