There are 99 birds on the roof

There are 99 birds on the roof. suddenly all birds fly away. some birds fly to east. birds fly to west is twice of that of east. birds fly to north is twice of that of west. Birds flies to south is same as in north. Find the no. of birds fly in all diections.

AQuA-RAT — Algebra Question Answering with Rationales (Ling et al., DeepMind, 2017) · train #12629