Tìm x: a) 25%x =75 b) 11/12x + 3/4 =1/6 c) 3/4 + 1/4 ( x-1) =1/2 làm ơn giúp mình với ạ ToT 11/11/2021 Bởi Vivian Tìm x: a) 25%x =75 b) 11/12x + 3/4 =1/6 c) 3/4 + 1/4 ( x-1) =1/2 làm ơn giúp mình với ạ ToT
a) 25%.x = 75 25/100.x = 75 x = 75 : 25/100 x = 300 Vậy x = 300 b) 11/12.x + 3/4 = 1/6 11/12.x = 1/6 – 3/4 11/12.x = -7/12 x = -7/12 : 11/12 x = -7/11 Vậy x = -7/11 c) 3/4 + 1/4.(x – 1) = 1/2 1/4.(x – 1) = 1/2 – 3/4 1/4.(x – 1) = -1/4 x – 1 = 1/4 : 1/4 x – 1 = -1 x = -1 + 1 x = 0 Vậy x = 0 Bình luận
a) `25%x =75` `x=75:25%` `x=75: 25/100` `x=75 : 1/4` `x=75.4` `x=300` b) `11/12 x + 3/4 =1/6` `11/12 x =1/6 – 3/4` `11/12 x = -7/12` `x= -7/12 : 11/12` `x= -7/12 . 12/11` `x=-7/11` c) `3/4 + 1/4 ( x-1) =1/2` ` 1/4 (x-1) = 1/2 -3/4` `1/4 (x-1) = -1/4` `x-1 = -1/4 : 1/4` `x-1=-1` `x=-1+1` `x=0` Bình luận
a) 25%.x = 75
25/100.x = 75
x = 75 : 25/100
x = 300
Vậy x = 300
b) 11/12.x + 3/4 = 1/6
11/12.x = 1/6 – 3/4
11/12.x = -7/12
x = -7/12 : 11/12
x = -7/11
Vậy x = -7/11
c) 3/4 + 1/4.(x – 1) = 1/2
1/4.(x – 1) = 1/2 – 3/4
1/4.(x – 1) = -1/4
x – 1 = 1/4 : 1/4
x – 1 = -1
x = -1 + 1
x = 0
Vậy x = 0
a) `25%x =75`
`x=75:25%`
`x=75: 25/100`
`x=75 : 1/4`
`x=75.4`
`x=300`
b) `11/12 x + 3/4 =1/6`
`11/12 x =1/6 – 3/4`
`11/12 x = -7/12`
`x= -7/12 : 11/12`
`x= -7/12 . 12/11`
`x=-7/11`
c) `3/4 + 1/4 ( x-1) =1/2`
` 1/4 (x-1) = 1/2 -3/4`
`1/4 (x-1) = -1/4`
`x-1 = -1/4 : 1/4`
`x-1=-1`
`x=-1+1`
`x=0`