Two Trucks, same mass, one pulling other

[aeromat]

Homework Statement

The max. acceleration of a truck is 2.6m/s^2. If the truck tows another truck with a mass the same as its own, what is its maximum acceleration?

Homework Equations

Knowing that acceleration is inversely proportional to mass.

The Attempt at a Solution

a is inversely proportional to "m"-mass
2.6m/s^2 = 1/2m
...

However, this relationship doesn't make sense the way I have put it together. Can someone help me find a mathematical explanation to this?

 

[Aureum]

F=ma Force=(Mass)(Acceleration)

If we keep Force the same then

F=(2m)(.5a)

As you can see all that happens to keep the force the same is to find the multiplicative inverse.

If you didn't decrease the acceleration then you would increase the Force.
To keep the equation equal.

2(F)=2(ma)=2ma