Question:
Solve k - 35 = -25 for k..

Answer:
10

Question:
Solve -18*w = 11 - 173 for w..

Answer:
9

Question:
Solve -42*t - 8 = -46*t for t..

Answer:
2

Question:
Solve -31*k + 19*k = -36 for k..

Answer:
3