C
co_nang_buong_binh2612


cho x thuoc z:
a+x=5 :a-x=9 :6-x=2y :y+3=6x
giai gium minh nha. cam on ban rat nhieu.
>-
a+x=5 :a-x=9 :6-x=2y :y+3=6x
giai gium minh nha. cam on ban rat nhieu.
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