Question: What is the solution?

Solve 7*a - 38 = -12*a for a.

Answer: 2

Question: What is the solution?

Solve 171*h + 143*h + 6750 = -136*h for h.

Answer: -15

Question: What is the solution?

Solve 0 = -34286594*k + 34285994*k + 67200 for k.

Answer: 112

Question: What is the solution?

Solve -68*l + 1560 = -72*l - 308*l for l.

Answer:
-5