Question: What is the solution?

Solve 107*q - 100 = 20*q - 448 for q.

Answer: -4

Question: What is the solution?

Solve 70*r = -63*r + 111*r - 242 for r.

Answer: -11

Question: What is the solution?

Solve -59*n = -31*n + 102*n + 447*n + 5193 for n.

Answer: -9

Question: What is the solution?

Solve 10*u = 94 - 44 for u.

Answer:
5