Question:
Solve 2*j - 18 = -6 for j..

Answer:
6

Question:
Solve 29764 = 790*a - 289*a - 17831 for a..

Answer:
95

Question:
Solve 0 = -53*u - 53*u for u..

Answer:
0

Question:
Solve 0 = -891*z + 660*z - 3927 for z..

Answer:
-17