Q: Solve -24*c + 20*c - 4 = 0 for c.

A: -1

Q: Solve -20 = -r - 15 for r.

A: 5

Q: Solve 17621*q - 400963 = 603434 for q.

A: 57

Q: Solve 0 = 3*t - 2*t + 9*t for t.

A:
0