Question:
Solve 30*z - 70 = 40*z for z..

Answer:
-7

Question:
Solve -16149*l - 155587 = 108128 + 543735 for l..

Answer:
-50

Question:
Solve 0 = -287*s - 3107 - 3494 for s..

Answer:
-23

Question:
Solve 47*w + 43*w - 290 = -42*w + 137*w for w..

Answer:
-58