Question: What is the solution?

Solve -135*a - 6348297 = -6331557 for a.

Answer: -124

Question: What is the solution?

Solve 0 = -67*x + 48*x + 114 for x.

Answer: 6

Question: What is the solution?

Solve 66*r + 686 = -53*r + 168*r for r.

Answer: 14

Question: What is the solution?

Solve -5 = -4*j - 9 for j.

Answer:
-1