Q: What is the solution?
Solve -35*d + 7 = -98 for d.

A: 3

Q: What is the solution?
Solve -39*f + 29*f + 140 = 0 for f.

A: 14

Q: What is the solution?
Solve 8*a - a - 28 = 0 for a.

A:
4