Question:
Solve 683 + 241 = 84*t for t..

Answer:
11

Question:
Solve 24*c = 29*c for c..

Answer:
0

Question:
Solve 9*a - 891 - 864 = -11*a - 19*a for a..

Answer:
45

Question:
Solve -2 = -13*r + 12*r for r..

Answer:
2