Question: What is the solution?

Solve -42 = 5*f + 2*f for f.

Answer: -6

Question: What is the solution?

Solve 103 = -27*a + 9*a - 23 for a.

Answer: -7

Question: What is the solution?

Solve -41*s = 10*s - 25*s + 78 for s.

Answer: -3

Question: What is the solution?

Solve 227*m - 220*m + 84 = 0 for m.

Answer:
-12