u/-4=-20

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Solution for u/-4=-20 equation: 


u in (-oo:+oo)

u/(-4) = -20 // + 20

u/(-4)+20 = 0

20-1/4*u = 0 // - 20

-1/4*u = -20 // : -1/4

u = -20/(-1/4)

u = 80

u = 80

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