-2/3-1/3(2x-5)=3/2 7,5x:(9-6 13/21)=2 13/25 28/08/2021 Bởi Mary -2/3-1/3(2x-5)=3/2 7,5x:(9-6 13/21)=2 13/25
;-; $1/$ `(-2)/3 – 1/3 (2x – 5) = 3/2` `-> 1/3 (2x – 5) = (-13)/6` `-> 2x – 5 = (-13)/2` `-> 2x = (-3)/2` `-> x = (-3)/4` Vậy `x = (-3)/4` $2/$ `7/5x : (9 – 6 13/21) = 2 13/25` `-> 7/5x : (9 – 139/21) = 63/25` `-> 7/5x : 50/21 = 63/25` `-> 7/5x = 6` `-> x = 30/7` Vậy `x = 30/7` Bình luận
Đáp án:
Giải thích các bước giải:
;-;
$1/$ `(-2)/3 – 1/3 (2x – 5) = 3/2`
`-> 1/3 (2x – 5) = (-13)/6`
`-> 2x – 5 = (-13)/2`
`-> 2x = (-3)/2`
`-> x = (-3)/4`
Vậy `x = (-3)/4`
$2/$ `7/5x : (9 – 6 13/21) = 2 13/25`
`-> 7/5x : (9 – 139/21) = 63/25`
`-> 7/5x : 50/21 = 63/25`
`-> 7/5x = 6`
`-> x = 30/7`
Vậy `x = 30/7`