How does proper waste management help prevent pollution

When waste is properly managed by recylcling, it does not end up in mills or habitats. Therefore it does not pollute the environment.

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.

: -)

i might be wrong but i think its a. let me know if i’m right and have a good rest of your day!