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a) (123-4x)-67=8
123-4x =8+67
123-4x =73
4x =123-73
4x =60
x =60:4
x =15
a)(123-4x)-67= 8 =(123-4x) =8+67 = 4x =123-75 4x=48 x=48:4 x=12
![](https://rs.olm.vn/images/avt/0.png?1311)
=> 123 - x = 8 + 67
=> 123 - x = 75
=> x = 123 - 75
=> x = 48
Vậy x = 48
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b)4.|x|-25=39:38
4.|x|-25=31(=3)
4.|x|=3+25
4.|x|=28
|x|=28:4
|x|=7
TH1: TH2:
x=7 x=-7
vậy x E(dấu thuộc nha) (7;-7)
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a)
\(5x-3=4x+6\)
\(\Rightarrow5x-4x=6+3\)
=> x = 9
Vậy x = 9
b)
\(7-2x=4x-67\)
\(\Rightarrow7+67=4x+2x\)
\(\Rightarrow6x=74\)
\(\Rightarrow x=\frac{37}{2}\)
Vậy x = 37 / 2
*5x -3 = 4x + 6
5x - 4x = 6 + 3
=> x = 9
Vậy x = 9.
*7 - 2x = 4x - 67
7 + 67 = 4x + 2x
74 = 6x
=> x = 37/3
Vậy x = 37/3.
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![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
123-4x=8+67
123-4x=75
4x=123-75
4x=48
x=12
vậy x=12
hok tốt nhé
\(\left(123-4x\right)-67=8\)
\(\Rightarrow123-4x=75\)
\(\Rightarrow4x=48\)
\(\Rightarrow x=12\)