Question:
Solve 814 = -105*r - 341 for r..

Answer:
-11

Question:
Solve 27*q - 80 + 134 = 0 for q..

Answer:
-2

Question:
Solve 9191*o - 9235*o = -1100 for o..

Answer:
25

Question:
Solve 210 = 14*i + 84 for i..

Answer:
9