Question:
Solve 3015 - 28729 = -321*a - 277*a for a..

Answer:
43

Question:
Solve -441 = -1237*l + 1300*l for l..

Answer:
-7

Question:
Solve 79*i + 415 = 24 - 557 for i..

Answer:
-12

Question:
Solve 2*n = 26 - 28 for n..

Answer:
-1