\(\left[231-\left(2x+3\right)\right]:22=9=>231-\left(2x+3\right)=9.22=198=>2x+3=231-198=33\)
=>2x=30=>x=15
Vậy x=15
231-(2x+3)=9.22
2x+3=231-9.22
2x=231-9.22-3
x=231-9.22-3chia 2 thêm dấu suy ra đầu dòng
[231-(2x+3)]:22=9
231-(2x+3) =9.22
231-(2x+3) =198
2x+3 =231-198
2x+3 = 33
2x = 33-3
2x = 30
x = 30/2=15