x=-1
Explanation
[tex]3(2x-12x)=30[/tex]
Step 1
apply distributive property
[tex]\begin{gathered} 3(2x-12x)=30 \\ 6x-36x=30 \\ \\ \end{gathered}[/tex]Step 2
add similar terms
[tex]\begin{gathered} 6x-36x=30 \\ -30x=30 \end{gathered}[/tex]Step 3
divide each side by -30
[tex]\begin{gathered} -30x=30 \\ \frac{-30x}{-30}=\frac{30}{-30} \\ x=-1 \end{gathered}[/tex]so, the answer is x=-1