X/2-912

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Solution for X/2-912 equation: 


X in (-oo:+oo)

X/2-9 < 12 // - 12

X/2-12-9 < 0

1/2*X-21 < 0 // + 21

1/2*X < 21 // : 1/2

X < 21/1/2

X < 42

X in (-oo:42)

(-oo:42)

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