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## Homework Statement

Use Matrices to solve for x and y if:

2y - 4x - 5 = 0 and y = 3x + 1

## Homework Equations

## 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??