Find the dimension of the subspace W={(x,y,z)∈R3:x+y+z=0,x−y=0}W = \{(x, y, z) \in \mathbb{R}^3 : x+y+z=0, x-y=0\}W={(x,y,z)∈R3:x+y+z=0,x−y=0}.
0
1
2
3