|`2x+1`| `=` `2,5`
`⇒` \(\left[ \begin{array}{l}2x+1=2,5\\2x+1=-2,5\end{array} \right.\)
`⇒` \(\left[ \begin{array}{l}2x=2,5-1\\2x=2,5-(-1)\end{array} \right.\)
`⇒` \(\left[ \begin{array}{l}2x=1,5\\2x=-3,5\end{array} \right.\)
`⇒` \(\left[ \begin{array}{l}x=1,5:2\\x=-3,5:2\end{array} \right.\)
`⇒` \(\left[ \begin{array}{l}x=0,75\\x=-1,75\end{array} \right.\)
