posted by David on .
Hi. I am having some problems with substitution method and i just can't seem to get these right. I have
1. 2x - 3y = -1 with y = x-1
2. -4x + y = 6 with -5x- y = 21 and finally,
3. -5x + y =-3 with 3x -8y = 24
post your work on each one, as separate questions. We and you need to see where you are going wrong.