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
a) ( 123 - 4x ) - 67 = 8
123 - 4x = 8 + 67
123 - 4x = 75
4x = 123 - 75
4x = 48
x = 12
b) \(\left(2^2.\left|x\right|-5^2\right).3^8=3^9\)
\(2^2.\left|x\right|-5^2=3\)
\(2^2.\left|x\right|=28\)
\(\left|x\right|=7\)
=> \(\orbr{\begin{cases}x=7\\x=-7\end{cases}}\)
a) (123-4x)-67=8
123-4x=8+67
123-4x=75
4x=123-75
4x= 48
x=48:4
x=12
b)(22.lxl-52).38=39
22.lxl-52=39:38
22.lxl-52=3
22.lxl =3+52
22.lxl =28
lxl=28:22
lxl=7
=>x=-7 hoặc 7
