Đáp án+Giải thích các bước giải:
`a,72 vdots x,184 vdots x`
`=>x in ƯC(72,184)`
`=>x in {+-1,+-2,+-3,+-4,+-6,+-8,+-9,+-12,+-18,+-24,+-36,+-72}`
`b,x vdots 54,x vdots 14,x vdots 32`
`=>x=BC(54,14,32)`
`=>x in {0,6048,.....}`
`c,x+2 vdots x`
`=>2 vdots x`
`=>x in Ư(2)={+-1,+-2}`
`d,2x+1 vdots x+1`
`=>2x+2-1 vdots x+1`
`=>1 vdots x+1`
`=>x in {0,-2}`
