Write down the solution for this math problem: Solve -197 - 289 = 54*k for k.
answer: -9

Write down the solution for this math problem: Solve 31*f + 130 = 138 + 240 for f.
answer: 8

Write down the solution for this math problem: Solve -41*h = -47*h - 6 for h.
answer: -1

Write down the solution for this math problem: Solve 4*b + 8*b + 48 = 0 for b.
answer:
-4