3/7*u=21

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Solution for 3/7*u=21 equation: 


u in (-oo:+oo)

(3/7)*u = 21 // - 21

(3/7)*u-21 = 0

3/7*u-21 = 0 // + 21

3/7*u = 21 // : 3/7

u = 21/3/7

u = 49

u = 49

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