Answer: 6 pigs and 3 chickens
Step-by-step explanation: you know that each pig has 4 legs and each chicken has 2 legs so start out by saying 9 pigs and 0 chickens which is 36 legs then try 8 pigs and 1 chickens and 8 times 4 = 32 + 2 which is 32 which is more than 30 then notice for every chicken there is you subtract 2 from 36
knowing this we can divide 6 by 2 and get 3 the number of chickens
so 6 pigs and 3 chickens
hope this helps mark me brainliest if it helped