If an island's only residents are penguins and bears, and if there are 14 heads and 30 feet on the island, how many penguins and how many bears are on the island?

Penguins (P): 1 H + 2 Ft

Bears (B): 1 H + 4Ft

Heads Equation:  1P + 1B = 14   → -2(1P + 1B = 14)   →  -2P - 2B = -28

Feet Equation:    2P + 4B = 30 →   1(2P + 4B = 30)  →  2P + 4B = 30

                                                                                               2B = 2

                                                                                                 B = 1

Heads Equation:  1P + 1B = 14   →  1P + 1(1) = 14  →  P = 13

13 Penguins and 1 Bear

this may not be at all, but i use the same website you're using for school, and if i'm stuck doing one of these i try to look for it on the section.