Matrix Vector Form write each system in Problem 1-3 in matrix vector form. Then write the augmented matrix of the system?
1. x + 2y = 1
2x - y = 0
3x + 2y = 1
2. i1 + 2i2 + i3 + 3i4 = 2
I1 - 3i2 + 3i3 = 1
3. r + 2s + r = 1
r - 3s + 3t = 1
4s - 5t = 3