Which statement best describes cancer cells

Explanation:Cancer cells are those cells that that have lost the ability to divide controably. Cancer cells undergo cell division without stopping thus leading to the development of cancerous tissues. ... Cancer cells has the ability to spread from one organ to another via the circulatory system.

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.

: -)