3 . (2x - 1) + (x - 4) = 0
➤ (2x - 1) + (x - 4) = 0
⇒ \(\left[{}\begin{matrix}2x-1=0\\x-4=0\end{matrix}\right.\)
⇒ \(\left[{}\begin{matrix}x=0,5\\x=4\end{matrix}\right.\)
Vậy 3 . (2x - 1) + (x - 4) = 0
= 3 . (2 . 0,5 - 1) + (4 - 4) = 0
3 . (2x - 1) + (x - 4) = 0
(2x - 1) + (x - 4) = 0
⇒ [2x−1=0x−4=0[2x−1=0x−4=0
⇒ [x=0,5x=4[x=0,5x=4
Vậy 3 .(2x - 1) + (x - 4) = 0
= 3 .(2 . 0,5 - 1) + (4 - 4) = 0