Question:
Solve 42*k - 448*k - 42579 = 478*k - 120371 for k..

Answer:
88

Question:
Solve 40*t + 2123 = -68*t - 85*t for t..

Answer:
-11

Question:
Solve 0 = 7*z + 73 - 38 for z..

Answer:
-5

Question:
Solve 51*q = -21*q - 4*q - 912 for q..

Answer:
-12