k.1/2-2/3x=7/12 tim x ( hôn sô) (2 4/5x-50):2/3=51 giup tui iiii 30/09/2021 Bởi Piper k.1/2-2/3x=7/12 tim x ( hôn sô) (2 4/5x-50):2/3=51 giup tui iiii
k) 1/2 – 2/3x = 7/12 2/3x = 1/2 – 7/12 2/3x = -1/12 x = -1/12 : 2/3 x = -1/8 Vậy x = -1/8 h) (2$\frac{4}{5}$x – 50) : 2/3 = 51 14/5x – 50 = 51 x 2/3 14/5x – 50 = 34 14/5x = 34 + 50 14/5x = 84 x = 84 : 14/5 x = 30 Vậy x = 30 Bình luận
Đáp án + giải thích bước giải : `k) 1/2 – 2/3x = 7/12` `-> 2/3x = 1/2 – 7/12` `->2/3x = -1/12` `-> x = -1/12 : 2/3` `-> x = -1/8` `(2 4/5x – 50) : 2/3 = 51` `-> 14/5x – 50 = 51 . 2/3` `-> 14/5x – 50 = 34` `-> 14/5x = 34 + 50` `-> 14/5x = 84` `-> x = 84 : 14/5` `-> x = 30` Bình luận
k) 1/2 – 2/3x = 7/12
2/3x = 1/2 – 7/12
2/3x = -1/12
x = -1/12 : 2/3
x = -1/8
Vậy x = -1/8
h) (2$\frac{4}{5}$x – 50) : 2/3 = 51
14/5x – 50 = 51 x 2/3
14/5x – 50 = 34
14/5x = 34 + 50
14/5x = 84
x = 84 : 14/5
x = 30
Vậy x = 30
Đáp án + giải thích bước giải :
`k) 1/2 – 2/3x = 7/12`
`-> 2/3x = 1/2 – 7/12`
`->2/3x = -1/12`
`-> x = -1/12 : 2/3`
`-> x = -1/8`
`(2 4/5x – 50) : 2/3 = 51`
`-> 14/5x – 50 = 51 . 2/3`
`-> 14/5x – 50 = 34`
`-> 14/5x = 34 + 50`
`-> 14/5x = 84`
`-> x = 84 : 14/5`
`-> x = 30`