Question:
Solve 8 - 3 - 65 = -30*j for j..

Answer:
2

Question:
Solve -1588*s + 16198 + 23357 + 53579 = -6910 for s..

Answer:
63

Question:
Solve -3809*r + 3740*r - 1449 = 0 for r..

Answer:
-21

Question:
Solve -12 = -3*d - 0 for d..

Answer:
4