Use Matrices to solve for x and y if:
2y - 4x - 5 = 0 and y = 3x + 1
The Attempt at a Solution
I have done it, but i get a determinant of zero. So is this right?
My working is the following:
i rewrote both equations in the form of ax+bx = 0
so, 4x - 2y + 5 =0 and -3x + y -1 = 0
then when i find the lAl <-- determant i get zero. i think its right, because isn't it a 2x3 matrix??