5/7u=-20 - solution

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Solution for 5/7u=-20 equation:

u in (-oo:+oo)

(5/7)*u = -20 // + 20

(5/7)*u+20 = 0

5/7*u+20 = 0 // - 20

5/7*u = -20 // : 5/7

u = -20/5/7

u = -28

u = -28

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