x * 12 + 121 = 229
x * 12 = 229 - 121
x * 12 = 108
x = 108 : 12
x = 9
Vậy x = 9 .
Xx 12+ 121= 229.
Xx 12= 229- 121.
Xx 12= 108.
X= 108: 12.
X= 9.
x*12+121=229
x*12 = 229 - 121
x*12 = 108
x = 108 : 12
x = 9
x x 12+121=229
x x 12 =229-121
x x 12 =108
x =108:12
x =9
chac chan 100% k cho minh nha ta phuong anh
X x 12+121=229
X x 12 = 229-121
X x 12 = 108
X = 108:12
X = 9
\(12x+121=229\)
\(12x=229-121\)
\(12x=108\)
\(\Rightarrow x=9\)
vay \(x=9\)
12x+121=229
12x=229-121
12x=108
x=108:12
X=9
=>x=9