Cíu iem với ạ . E đg cần gấp . Thanks ạ

` 1a)x/5=2/3 `

` =>3x=2.5=10 `

` =>x=10/3 `

` b)x+1/2=0 `

` =>x=0-1/2=-1/2 `

` c)3/4 x=1/2 `

` =>x=1/2 : 3/4 `

` =>x=1/2 . 4/3 `

` =>x=2/3 `

` d)x-4/7=3/2 `

` =>x=3/2+4/7=21/14+8/14 `

` =>x=29/14 `

` e)4/7 :x=13 `

` =>x=4/7 : 13 `

` =>x=4/7 . 1/13 `

` =>x=4/91 `

` 2a)1/3+2/3 :x=-7 `

` =>2/3 :x=-7-1/3=-21/3-1/3 `

` =>2/3 :x=-22/3 `

` =>x=2/3 : (-22)/3 `

` =>x=2/3 . (-3)/22 `

` =>x=(-1)/11 `

` b)2/3 :x=1,4-12/5=7/5-12/5 `

` =>2/3 :x=-5/5=-1 `

` =>x=2/3 : (-1) `

` =>x=-2/3 `

` c)(4,5-2x) . 1 4/7=11/14 `

` =>(9/2-2x) . 11/7=11/14 `

` =>9/2-2x=11/14:11/7 `

` =>9/2-2x=11/14 . 7/11 `

` =>9/2-2x=1/2 `

` =>2x=9/2-1/2=8/2=4 `

` =>x=4:2=2 `

` 3a)x-4=5/3 . (-1)/2=(-5)/6 `

` =>x=(-5)/6+4=(-5)/6+24/6=19/6 `

` b)x+1/4=(-3)/4 . 23/(-15) . ((-45)/92) `

` =>x+1/4=((-3).23.(-15).3)/(4.(-15).23.4) `

` =>x+1/4=((-3).3)/(4.4) =(-9)/16 `

` =>x=(-9)/16-1/4=(-9)/16-4/16=(-13)/16 `

` c)(x-3/4)-1/4=3/5 . |(-1)/3| `

` =>x-3/4-1/4=3/5 . 1/3 `

` =>x-4/4=1/5 `

` =>x-1=1/5=>x=1/5+1=1/5+5/5=6/5 `

` d)(x+2/3)+1/11=(10/(-33) .11/8) . 24/(-55) `

` =>x+2/3+1/11=(2.5.11.8.3)/((-3).11.8.(-5).11) `

` =>x+22/33+3/33=2/((-1).(-1).11) `

` =>x+25/33=2/11 `

` =>x=2/11-25/33=6/33-25/33=(-19)/33 `