Question: What is the solution?

Solve 173*s = 653 + 212 for s.

Answer: 5

Question: What is the solution?

Solve 7*a + 75 = -4*a - 132 + 108 for a.

Answer: -9

Question: What is the solution?

Solve 0 = -38*j - 32 - 82 for j.

Answer: -3

Question: What is the solution?

Solve -5*z + 0 + 20 = 0 for z.

Answer:
4