`1,a. 3/4 - x = 1`
`<=>x=-1/4`
`b. x + 4 = 1/5`
`<=>x=-19/5`
`c, x + 5/3 = 1/81`
`<=>x=-134/81`
`d,(x + 1/3 )^2 + 4/9 = 8/9`
`<=>(x+1/3)^2=4/9`
`<=>x+1/3=2/3` hoặc `x+1/3=-2/3`
`<=> x=1/3` hoặc `x=-1`
`e. |x- 3/2| = 1`
`<=>x-3/2=1` hoặc `x-3/2=-1`
`<=>x=5/2` hoặc `x=1/2`
`f. 17|4 - |5/6 - x| = -7/4`
`<=>5/6-x=6` hoặc `5/6-x=-6`
`<=>x=-31/6` hoặc `x=41/6`
`2,` `a. 7/3 + 1/2 - -3/70`
`=17/6+3/70`
`=302/105`
`b. 9/50 - 13/75 - 1/6`
`=1/150-1/6`
`=-4/25`