Question:
Solve 0 = 5*x + 15 - 30 for x..

Answer:
3

Question:
Solve 37*k = 34*k - 9 for k..

Answer:
-3

Question:
Solve 16283 = 309*l - 1264*l + 98*l for l..

Answer:
-19

Question:
Solve 46*v - 329*v = 759*v + 24*v + 62894 for v..

Answer:
-59