After the holidays, Liza always brought an album with photos of different animals. These are some of the photos. 1) What animals did Liza see on her holidays?

Это пропорции.
12х=(х+6)×36
12х=36х+216
-36х+12х=216
-24х=216
Х=216:(-24)=-(216:24)
Х=-9.