17. If Easter Island went through an ecological disaster in the early 1600's how is it that when visited in the mid 1600's the
people seemed stable and healthy? Make sure to explain the
birdman symbol and what it represented.

try using substitution:

x + y - 6 = x - y. (i'm not giving you the exact answer). since 0 = x - y, then sub 0 in the equation with x - y. combine your like terms, and then use inverse operations, and you'll have your answer.

: -)

can you give me more to work here with plzs and you

i would say it is

i think the answer is composed of atoms