The replication of a parent cell or organism that results in a genetically identical offspring is known as
sexual reproduction
asexual reproduction
isogamy
oogamy

The right answer is asexual reproduction

A species is said to have an asexual reproduction when it can reproduce without the intervention of a congener of the opposite sex. All the formed individuals correspond to clones: their genetic inheritance is identical to that of the mother.

Vegetative propagation can be observed in animals, plants and bacteria.

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.

: -)