Describe what the town looked like when the Once-ler first arrived in his wagon.

In the movie Lorax

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.

: -)

some of your causes might be acidic rain or natural wildfires that cause the parks to be degraded

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