Question:
Solve 51441 - 51693 = 21*z for z..

Answer:
-12

Question:
Solve 120824 + 39688 = 2816*n for n..

Answer:
57

Question:
Solve 124 = -11363*o + 11332*o for o..

Answer:
-4

Question:
Solve 0 = -283*z - 381201 + 378371 for z..

Answer:
-10