Question: What is the solution?

Solve 385 = -47*z - 30*z for z.

Answer: -5

Question: What is the solution?

Solve -136*n - 129*n + 30 = -280*n for n.

Answer: -2

Question: What is the solution?

Solve -20 = q + 4*q for q.

Answer: -4

Question: What is the solution?

Solve 87*s - 5*s - 1677 + 377 = -18*s for s.

Answer:
13