Question: What is the solution?

Solve 7*k = -81*k + 352 for k.

Answer: 4

Question: What is the solution?

Solve -542*y - 106*y = -7523 + 1043 for y.

Answer: 10

Question: What is the solution?

Solve -12*k - 158 - 107 = -13 for k.

Answer: -21

Question: What is the solution?

Solve -169 - 191 = 180*w for w.

Answer:
-2