Q: What is the solution?
Solve 1979*u - 25036 + 2929 - 21431 = 0 for u.

A: 22

Q: What is the solution?
Solve 20*d - 10*d = -124*d - 3082 for d.

A: -23

Q: What is the solution?
Solve -99*i + 253 = 3025 for i.

A:
-28