What is the name of the property where the order matters?
1) Associative Property
2) Communtative Property
3) Distributive Property

Any is very appreciated! (picture is provided below)not sure how to do this at all won't lie

Two times a number plus three times another number equals 4. three times the first number plus four times the other number is 7. find the numbers

Roger could feed 5 walruses with 4 kilograms of fish. how many walruses could he feed with 7.2 kilograms of fish?