\(\left(x-2\right).3-6=120\Leftrightarrow\left(x-2\right).3=126\Leftrightarrow x-2=42\Leftrightarrow x=44\)
Trả lời:
(x - 2) x 3 - 270 : 45 = 120
=> (x - 2) x 3 - 6 = 120
=> (x - 2) x 3 = 120 + 6
=> (x - 2) x 3 = 126
=> x - 2 = 126 : 3
=> x - 2 = 42
=> x = 42 + 2
=> x = 44