Distribute the -2 on the left and the -3 on the right:
[tex]-4t-6=-4-3t-12[/tex]
Clean up the right side by combining the constants:
[tex]-4t-6=-16-3t
[/tex]
Add 4t to both sides to eliminate -4t on the left:
[tex]-6=-16+t[/tex]
Finally, add 16 to both sides to isolate the t on the right:
[tex]10=t[/tex]
That's the solution: [tex]t=10[/tex]
Hope this helps.