What type of cat would be the best control to compare with Calix?

Black Male

Explanation:

lol i did it

black male

Explanation:

It would let us see the difference between Calix and a normal male cat

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.

: -)