Q: What is the solution?
Solve -13 - 9 = 6*a + 50 for a.

A: -12

Q: What is the solution?
Solve 5*u = -0*u + 10 for u.

A: 2

Q: What is the solution?
Solve 673*u - 488*u = -1494*u - 119209 for u.

A:
-71