2|х|+3=15
2|х|=15-3
2|х|=12
|х|=12:2
|х|=6
х1=6
х2= -6
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2|х|+3=15
2|х|=15-3
2|х|=12
|х|=12:2
|х|=6
х1=6
х2= -6