Given Ax=bAx = bAx=b with A=(1111)A = \begin{pmatrix} 1 & 1 \\ 1 & 1 \end{pmatrix}A=(1111) and b=(12)b = \begin{pmatrix} 1 \\ 2 \end{pmatrix}b=(12), how many solutions exist?
0
1
2
Infinitely many