Q: What is the solution?
Solve 12*i - 50 + 74 = 0 for i.

A: -2

Q: What is the solution?
Solve 0 = -10*u + 13*u - 6 for u.

A: 2

Q: What is the solution?
Solve 10*a + 2119 = 98*a + 75*a for a.

A:
13