1)|x|-9=3; |x|=12; x=12; -12
2)|x|-9=-3; |x|=6; x=6;-6
Ответ x={-12;-6;6;12}
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1)|x|-9=3; |x|=12; x=12; -12
2)|x|-9=-3; |x|=6; x=6;-6
Ответ x={-12;-6;6;12}