ANSWER:
[tex]-3n+10[/tex]STEP-BY-STEP EXPLANATION:
We have the following expression:
[tex]3(2-5n)+4+12n[/tex]we simplify we have the following:
[tex]\begin{gathered} 6-15n+4+12n \\ \text{ we group like terms} \\ (-15n+12n)+(6+4) \\ -3n+10 \end{gathered}[/tex]