Question: What is the solution?

Solve -66*h + 72*h = 12 for h.

Answer: 2

Question: What is the solution?

Solve 23*a + 115 = -23 for a.

Answer: -6

Question: What is the solution?

Solve 0 = 100*g + 72*g - 146*g + 130 for g.

Answer: -5

Question: What is the solution?

Solve 121858828*m = 121858961*m + 16359 for m.

Answer:
-123