Roziwiąż nierówność |-x+5|<10
(czyli)
-x+5<10 i -x+5>-10
|-x+5|<10
-10<-x+5<10
-15<-x<5
15>x>-5
x> -5
x < 15
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|-x+5|<10
-10<-x+5<10
-15<-x<5
15>x>-5
x> -5
x < 15