Human skin color varies widely around the world, and chi information, what is true about human skin color?
httisin

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.

: -)

b brown mice / white sand dunes

the animal that would be cutest if scaled down to the size of a cat? elephant