A biopsy is the removal of a sample of tissue to see whether cancer cells are present. If they are not present, then the biopsy is said to be

benign

Explanation:

- A benign tumor is not cancerous.

- A malignant tumor is cancerous and can possibly spread to other parts of the body.

- the biopsy may also indicate other conditions (not a cancer )

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 think the answer is gold im not entirely sure