To use a program compiled for 32 bit, the Android development tools for example, you need the ia32 compatibility package if you're using 64 bit.
First add i386 to your list of architectures, update apt-get then install ia32
dpkg --add-architecture i386
apt-get install ia32-libs
If you need to install a 32 bit version of something, issue the command as normal but with :i386 appended:
apt-get install libncurses5:i386
unix unix-debian-ia32 unix-debian
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