Question:
Solve 0 = -7*i - 303 + 296 for i..

Answer:
-1

Question:
Solve -89194 = -2074*r + 4013*r for r..

Answer:
-46

Question:
Solve 0 = -s - 513 + 515 for s..

Answer:
2

Question:
Solve 2*n + 5 - 3 = 0 for n..

Answer:
-1