Question: What is the solution?

Solve 618*d + 81*d + 433*d + 20329 + 55515 = 0 for d.

Answer: -67

Question: What is the solution?

Solve 4*x = 10*x - 24 for x.

Answer: 4

Question: What is the solution?

Solve 10*u - 5*u + 25 = 0 for u.

Answer: -5

Question: What is the solution?

Solve 0 = -136*x + 106*x + 60 for x.

Answer:
2