Đáp án:
Giải thích các bước giải:
a) `2 2/3-x=5/6`
`=>6/3+2/3-x=5/6`
`=>8/3-x=5/6`
`=>x=8/3-5/6`
`=>x=11/6`
Vậy `x=11/6`.
b) `3/2x+1/7=(-7)/8*(-64)/49`
`=>3/2x+1/7=8/7`
`=>3/2x=8/7-1/7`
`=>3/2x=1`
`=>x=2/3`
Vậy `x=2/3`.
c) `3/5+|x-1/2|=75%`
`=>3/5+|x-1/2|=3/4`
`=>|x-1/2|=3/4-3/5`
`=>|x-1/2|=3/20`
`=>x-1/2=3/20` hoặc `x-1/2=(-3)/20`
`=>x=3/20+1/2` hoặc `x=(-3)/20+1/2`
`=>x=13/20` hoặc `x=7/20`
Vậy `x in{13/20;7/20}`.
d) `5-2/3x=1 1/10-10%`
`=>5-2/3x=11/10-10%`
`=>5-2/3x=1`
`=>2/3x=5-1`
`=>2/3x=4`
`=>`$x=4:\dfrac{2}{3}$
`=>x=6`
Vậy `x=6`.
