`text{Đáp án + Giải thích các bước giải}`
`1.`
`x + 1/4 = 4/3`
`⇒x= 4/3 - 1/4`
`⇒ x= 13/12`
`text{_____________________________________________________}`
`2.`
`-x - 2/3= -6/7`
`⇒-x= -6/7 + 2/3`
`⇒-x=-4/21`
`⇒x= 4/21`
`text{_____________________________________________________}`
`3.`
`4/5 - x = 1/3`
`⇒x = 4/5 - 1/3`
`⇒x = 7/15`
`text{_____________________________________________________}`
`4.`
`(5x - 1)(2x - 1/3) = 0`
`⇒` \(\left[\begin{array}{l}5x - 1 = 0 \\2x - \dfrac{1}{3} = 0\end{array} \right.\)
`⇒` \(\left[ \begin{array}{l}5x = 1\\2x = \dfrac{1}{3} \end{array} \right.\)
`⇒` \(\left[ \begin{array}{l}x = \dfrac{1}{5} \\x = \dfrac{1}{6} \end{array} \right.\)
`text{_______________________________________________________}`
`5.`
`x + 1/2 = 2^5 : 2^3`
`⇒ x + 1/2 = 2^2`
`⇒ x + 1/2 = 4`
`⇒ x= 4 - 1/2`
`⇒ x= 7/2`
`text{_____________________________________________________}`
`6.`
`|x + 5| - 6 = 9`
`⇒ |x + 5|= 9 + 6`
`⇒ |x + 5|= 15`
`⇒` \(\left[ \begin{array}{l}x + 5 = 15\\x + 5 = -15\end{array} \right.\)
`=>` \(\left[ \begin{array}{l}x = 10\\x = -20\end{array} \right.\).
XIN HAY NHẤT.
MONG MOD KO XÓA.
KO SAO CHÉP.
