By distributing the minus sign into the parenthesis, we have the following equivalent expression:
[tex]3x+1-6x+4[/tex]Now, by combining similar terms, we have
[tex]\begin{gathered} 3x-6x+1+4 \\ \text{which gives} \\ -3x+5 \end{gathered}[/tex]Then, by comparing with the given options, the answer is option 3: -3x+5
