u/3+7=-2

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Solution for u/3+7=-2 equation: 


u in (-oo:+oo)

u/3+7 = -2 // + 2

u/3+2+7 = 0

1/3*u+9 = 0 // - 9

1/3*u = -9 // : 1/3

u = -9/1/3

u = -27

u = -27

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