How does molecules in the air that come into the plants leaves affect the plants mass

The carbon comes from carbon dioxide used during photosynthesis. During photosynthesis, plantsconvert the sun's energy into chemical energy which is captured within the bonds of carbon molecules built from atmospheric carbon dioxide and water

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.

: -)

it’s lava came from an explosive eruption