Question: What is the solution?

Solve -78*j + 212*j = -4154 for j.

Answer: -31

Question: What is the solution?

Solve 10*d + 0*d = 0 for d.

Answer: 0

Question: What is the solution?

Solve 559 = -31*w - 50 + 51 for w.

Answer: -18

Question: What is the solution?

Solve 22*u = -99 - 148 - 17 for u.

Answer:
-12