porque fue decisivo encontrar bandas de distinta orientacion magnetica paralelas a las dorsales oceanicas?

the answer is yes, they are born/created, then they grow to their limit then produce offspring, then die.

the wires in the toaster turning red and the toast crisping and turning brown

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.

: -)

your spelling is a little off : ]