1)
|х|+5=9
|х|=9-5
|х|=4
х1=4
х2= -4
2)
-|х|=3
|х|= -3
х=∅
3)
-х=18
х=18:(-1)
х= -18
4)
-(-х)= -1
х= -1
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Answers & Comments
1)
|х|+5=9
|х|=9-5
|х|=4
х1=4
х2= -4
2)
-|х|=3
|х|= -3
х=∅
3)
-х=18
х=18:(-1)
х= -18
4)
-(-х)= -1
х= -1