28=7/4u

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Solution for 28=7/4u equation: 


u in (-oo:+oo)

28 = (7/4)*u // - (7/4)*u

28-((7/4)*u) = 0

(-7/4)*u+28 = 0

28-7/4*u = 0 // - 28

-7/4*u = -28 // : -7/4

u = -28/(-7/4)

u = 16

u = 16

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