well, geez -- how about, um, substituting?
You see that x = y-6, so substitute that into the other equation and you can then find y:
y = 6-3(y-6)
...
Solve the system using substitution.
x = y − 6
y = 6 − 3x
A. (0, 6)
B. (6, 0)
C. (0, −6)
D. (−6, 0)
2 answers
answer is A