an explanation of a phenomenon that has undergone experimentation and is generally accepted by scientists scientific law
soft fact
concept
hypothesis
theory

its 42

i say its d?

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.

: -)

idk im sorry.