`6xy : (3x + 2y)`
`= (6xy : 3x) + (6xy : 2y)`
`= 2y + 3x`
6xy:(3x+2y)
= 6xy:3x+6xy:2y
= 2y + 3x
Câu thơ:"những kẻ vá trời khi lỡ bước
Gian nan chi kể việc con con
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