Q: Solve -20 = -166*t + 170*t for t.

A: -5

Q: Solve -54*c - 26 = -28*c for c.

A: -1

Q: Solve -2 = 23*x - 21*x for x.

A: -1

Q: Solve 1981 - 1382 = 423*b - 2362 for b.

A:
7