Hmmm, I was doing well until I came up against these little buggers.
4x + 3 = 6 and
2x - 1
3x - 2 = -5
x + 4
Solve for x
I come up with x = -9/8 on the first, whilst the text book has 8/9 and second x = 9 and -9/4 respectively.
any help would be greatly appreciated.
P.S. it was hard enough to write out the formulas above, can anyone lead me to where I might learn a quicker way. thanks again.