Question:
Solve -531*w + 537*w = -12 for w..

Answer:
-2

Question:
Solve -m + 5*m - 8 = 0 for m..

Answer:
2

Question:
Solve 169461 = 920*k + 1613*k + 17139 - 9790 for k..

Answer:
64

Question:
Solve 7*r + 974 = -982 + 2026 for r..

Answer:
10