just use a LAW...

Just follow the tank from behind.Then blow it out using LAW.

First get all your guys into the cannon fox hole to the left of the man you are meeting.
Have your men crouch down right away and ready to kill. When clear enough, go for the
yellow smoke leaving your men at fox hole and then run back with smoke to fox hole. Take
care of trench openings that VC are running in from with the smoke air suport(One at a
time and take your time). Now you can kill the tank from the safty of your fox hole with
either a smoke air suport or a laws rocket. If using smoke, you will have to time it by
throwing smoke a ways in front of tank.

you have to leave on guy in the room wheare you start from make shure hes laying down then
come back with a law and throw a red smoke before shooting the law