Question: What is the solution?

Solve -226*z - 210*z = 116*z - 448*z - 9360 for z.

Answer: 90

Question: What is the solution?

Solve 1575*b - 1990*b = -19920 for b.

Answer: 48

Question: What is the solution?

Solve -7*z + z + 9*z = -12*z for z.

Answer: 0

Question: What is the solution?

Solve 52*j = -75*j - 1397 for j.

Answer:
-11