Q: What is the solution?
Solve 509 + 811 = 49*a + 144 for a.

A: 24

Q: What is the solution?
Solve 50 = -d + 51 for d.

A: 1

Q: What is the solution?
Solve 5704*l - 1064549 = -7654*l - 19631 + 90512 for l.

A:
85