4=u/6.4

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Solution for 4=u/6.4 equation: 


u in (-oo:+oo)

4 = u/6.4 // - u/6.4

4-(u/6.4) = 0

4-0.15625*u = 0

4-0.15625*u = 0 // - 4

-0.15625*u = -4 // : -0.15625

u = -4/(-0.15625)

u = 25.6

u = 25.6

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