3u/7=-12 - solution

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Solution for 3u/7=-12 equation:

u in (-oo:+oo)

(3*u)/7 = -12 // + 12

(3*u)/7+12 = 0

3/7*u+12 = 0 // - 12

3/7*u = -12 // : 3/7

u = -12/3/7

u = -28

u = -28

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