What is the function of cytosol in a cell

The cytosol, by definition, is the fluid in which organelles of the cell reside.

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.

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there's the proffessional site that will you.