Question:
Solve 76*c - 10 = 71*c for c..

Answer:
2

Question:
Solve 174*i - 1362534 = -1361316 for i..

Answer:
7

Question:
Solve -78*a - 641 + 173 = 0 for a..

Answer:
-6

Question:
Solve 120 = -11*r + 32 for r..

Answer:
-8