Bài `10`
`x- [17/2 -(-3/7 + 5/3)]=-1/3`
`x- [17/2(-9/21 + 35/21)]=-1/3`
`x- (17/2- 26/21)=-1/3`
`x- 305/42=-1/3`
`x= -1/3+ 305/42`
`x= -14/42 + 305/42`
`x= 291/42`
`------------`
`9/2-[2/3 -(x+7/4)]=-5/4`
`2/3 -(x+7/4) = 9/2 -(-5/4)`
`2/3 -(x+7/4) = 9/2+5/4`
`2/3 -(x+7/4) = 23/4`
`x+7/4= 2/3 - 23/4`
`x+7/4= -61/12`
`x= -61/12 - 7/4`
`x=-41/6`
