how to: graph, substitution, and elimination

Question

y=3x+4
-12x+4y=16

Answer 1

-12 x + 4 (3x+4) = 17

-12 x + 12 x + 16 = 17
0 = 1 :)

inconsistent
These two lines are parallel and there is no solution
y = 3 x + 4 has m = slope = 3

4 y = 12 x + 16 is y = 3 x + 4
m = 3 again, same slope, different y intercept