|That doesn't make sence to me.|
You cannot combine the 2 partitions while at the first you've installed Win7 32 bit and at the second there is installed Win7 64 bit.
So first you have to decide, which Windows version you will use further.
The installed programs from the "merged" partition will not work after that, cause you are missing some DLL files and further more alot of registry settings for that programs.
So if you'd like to merge the 2 partitions, you only can use the data, stored on the second partition.
So the easiest way to manage that is, to copy all the data folders of the second partition to the first partition, empty the second partition and merge the empty partition to the first partition by using e.g. GParted.