u/2-5-9

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Solution for u/2-5-9 equation: 


u in (-oo:+oo)

u/2-5 < -9 // + 9

u/2-5+9 < 0

1/2*u+4 < 0 // - 4

1/2*u < -4 // : 1/2

u < -4/1/2

u < -8

u in (-oo:-8)

(-oo:-8)

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