Which equation shows the substitution method being used to solve the system of linear equations? i was thinking b but don't know for sure
x + y = 6
x = y + 2
a.
x + (y + 2) = 6
b.
x + y = y + 2
c.
(y + 2) + y = 6
d.
x = (x – 6) + 2

i believe the correct answer is option 4.principalities were small territories that were run by russian rulers.

which statement correctly defines principalities in northern asia in the 1200s? principalities were small territories that were run by russian rulers.

hope i could ! : )

8

step-by-step explanation:

sounds & other waves originate from any vibrating object