Question:
Solve 3*z - 7*z = 0 for z..

Answer:
0

Question:
Solve 3307*m = 3309*m for m..

Answer:
0

Question:
Solve 123*p + 3 = 121*p + 17 for p..

Answer:
7

Question:
Solve 0*k + 12 = 4*k for k..

Answer:
3