Q: What is the solution?
Solve 154 - 91 = -9*x for x.

A: -7

Q: What is the solution?
Solve -45*y - 765 = 72*y - 32*y for y.

A: -9

Q: What is the solution?
Solve 157 = -5779*u + 5858*u - 159 for u.

A:
4