(27x+6): 3 - 11 = 9
<=> (27x + 6) :3 = 9 + 11
<=> (27x +6) :3 = 20
<=> (27x +6) = 20. 3
<=> (27x +6) = 60
<=> 27x = 60 - 6
<=> 27x = 54
<= > x = 54 : 27
<=> x = 2
Vậy x = 2
(27x+6):3-11=9
(27x+6):3=9+11
(27x+6):3=20
(27x+6)=20*3
27x+6=60
27x=60-6
27x=54
x=54:27
x=2
(27X+6):3-11=9
(27X+6):3=9+11=20
27X+6=20.3=60
27X=60-6=54
X=54:27
X=2