Question: What is the solution?

Solve 695*a = 772*a - 2156 for a.

Answer: 28

Question: What is the solution?

Solve -3*r - 2421 + 2412 = 0 for r.

Answer: -3

Question: What is the solution?

Solve 765*r + 9051 + 3136 = -520*r - 14798 for r.

Answer: -21

Question: What is the solution?

Solve 22206 = -1315*i + 2184 - 5941 - 59512 for i.

Answer:
-65