Which matrix equation represents the system of equations?
2x + 4y + 2 = 0
y = x + 4
1 Answer

2x + 4y + 2 = 0 =====> 2x + 4y = 2
y = x + 4 =========> 1x + 1y = 4
[2 4] [x] = [2]
[1 1] [y] = [4]
Assume the brackets are each one big giant one. The multiple ‘=’s should be interpreted as one equal sign for the entire matrix equation, not for individual rows.
EDITED THE ABOVE!!!
A 2×2 matrix multiplied by a 2×1 matrix yields a 2×1 matrix… not a 1×2 matrix as I had previously written. Sorry about that.