Đáp án:
$\\$
`a,`
`(-3)/5 - x = -0,75`
`-> x = (-3)/5 - (-0,75)`
`->x=3/20`
Vậy `x=3/20`
`b,`
`x+1/3 = 2/5 - (-1/3)`
`->x+1/3=11/15`
`->x=11/15 -1/3`
`->x=2/5`
Vậy `x=2/5`
`c,`
`2 1/2 - x + 4/5 = 2/3 - (-4)/7`
`-> 5/2 - x + 4/5 = 26/21`
`-> -x + 33/10 = 26/21`
`-> -x=26/21 - 33/10`
`->-x=(-433)/210`
`->x=433/210`
Vậy `x=433/210`
`d,`
`1 4/5 = -0,15-x`
`-> -0,15-x = 9/5`
`-> x = -0,15 - 9/5`
`->x=(-39)/20`
Vậy `x=(-39)/20`
`e,`
`(-4)/7 - x = 3/5 - 2x`
`-> -x - 4/7 = -2x + 3/5`
`-> -x + 2x = 4/7 + 3/5`
`-> x=41/35`
Vậy `x=41/35`
`f,`
`(3/8 - 1/5) + (5/8 - x) = 1/5`
`-> 1/5 - (3/8 - 1/5) = 5/8 - x`
`-> 5/8 - x = 1/5 - 3/8 + 1/5`
`-> 5/8 - x = 2/5 - 3/8`
`-> 5/8 - x=1/40`
`->x=5/8 - 1/40`
`->x=3/5`
Vậy `x=3/5`
