I have a hot water leak in a copper pipe about 5 inches slab is 12inches does anyone know any easy way to fix?

Are you saying the leaking pipe is embedded into the slab?

If so, the only practical way to fix it is to break open the slab to expose the leak..

~aaron

I have a hot water leak in a copper pipe about 5 inches slab is 12inches does anyone know any easy way to fix?

Rocco's correct! There is no easy way to repair a under slab leak. The cement will have to come up and the system drained down before you can even began to repair the leaky pipe. Good luck, Tom

There are some plumbers that can put an epoxy type glue into your water pipes and it will seal the leak. I have seen it done but I don't put much faith in it.
One way that I have come up with a cheap fix for people that could not afford it was to locate both ends of the pipe that has the leak in it. I would then disconnect both ends of the pipe and then I would run a 3/8 inch PEX tubing through the pipe and then connect the PEX to the pipes that the leaker was connected to. This only works if all the joints are above the floor and you do no have a kink in the pipe that would keep the PEX from slipping through. Good luck and if you try this let me know if it worked for you.