Tìm x
<!--[if gte msEquation 12]> mso-hansi-font-family:"Cambria Math";font-style:italic;mso-bidi-font-style:
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- mso-hansi-font-family:"Cambria Math";font-style:italic;mso-bidi-font-style:
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normal'>x3-2=-1<!--[endif]--><!--[if gte vml 1]--> coordsize="21600,21600" o:spt="75" o:preferrelative="t" path="m@4@5l@4@11@9@11@9@5xe"
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<!--[endif]-->----- Nội dung dịch tự động từ ảnh -----
017
8
1
7
(-2) = -1
3