Q: Solve:
Solve -66*r - 212 = -108*r - 2 for r.

A: 5

Q: Solve:
Solve 12*c - 969 - 1023 - 620 = -2024 for c.

A: 49

Q: Solve:
Solve 45*t = 252*t - 2277 for t.

A:
11