Question:
Solve 18*l - 11*l - 21 = 0 for l..

Answer:
3

Question:
Solve 4*j - 239 + 235 = 0 for j..

Answer:
1

Question:
Solve -911*a + 662*a + 6387 = 1336*a + 28577 for a..

Answer:
-14

Question:
Solve -28687*k - 56 = -28680*k for k..

Answer:
-8