Question:
Solve -46*k - 394*k - 10*k + 23445 + 6705 = 0 for k..

Answer:
67

Question:
Solve 0 = 2*s - 224 + 278 for s..

Answer:
-27

Question:
Solve 4421*r - 87390 = -163586 - 258962 - 49469 for r..

Answer:
-87

Question:
Solve f + 140 = 141 for f..

Answer:
1