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2014-10-20T22:30:46+03:00
63+x-7<1
63+x<1+7
63+x<8
x<8-63
x<(-55)_
Cel mai inteligent răspuns!
2014-10-20T22:34:36+03:00
63+x-7<47-46
63+x-7<1
x<-63+7+1
x<-63+8
x<-55

x ⊂ (apartine intervalului) (-55,- ∞)
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