Question: What is the solution?

Solve 3*x = -x - x for x.

Answer: 0

Question: What is the solution?

Solve 2 = 56*i + 1042 + 1704 for i.

Answer: -49

Question: What is the solution?

Solve 23*c + 55*c = 3*c - 1275 for c.

Answer: -17

Question: What is the solution?

Solve 4*h + 42 + 128 = 518 - 144 for h.

Answer:
51