If soil have all nutrients, then why do we need to replenish it.
Urgent!!!

because when we griw theplants over there all the nutrition will be already consumed so, we need to replenish it time to time.

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.

: -)

all matter is made up of atoms

in any element all atoms are the same

elements in a compound are always in a constant ratio: apex