Question: What is the solution?

Solve -75*r - 14208 - 1452 = 430*r + 14640 for r.

Answer: -60

Question: What is the solution?

Solve 7141*c = 7619*c - 478 for c.

Answer: 1

Question: What is the solution?

Solve -22*d + 60 = -12*d for d.

Answer: 6

Question: What is the solution?

Solve -501*c + 981 + 1812 + 2217 = 0 for c.

Answer:
10