Q: Solve -17*f = -13*f + 16 for f.

A: -4

Q: Solve -6889 + 38953 = 50*v + 284*v for v.

A: 96

Q: Solve -6598323 = 295*q - 6570593 for q.

A: -94

Q: Solve 6868645 = 148*x + 6867609 for x.

A:
7