7u/8=-21 - solution

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Solution for 7u/8=-21 equation:

u in (-oo:+oo)

(7*u)/8 = -21 // + 21

(7*u)/8+21 = 0

7/8*u+21 = 0 // - 21

7/8*u = -21 // : 7/8

u = -21/7/8

u = -24

u = -24

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