Question:
Solve 168 = -12*b + 108 for b..

Answer:
-5

Question:
Solve 1744*u + 89597 - 14813 = -2693*u + 501*u for u..

Answer:
-19

Question:
Solve -100*y - 42*y - 856 - 422 = 0 for y..

Answer:
-9

Question:
Solve -2404*m + 34385 = 177889 + 39200 for m..

Answer:
-76