Write down the solution for this math problem: Solve 827*f = -347*f + 7044 for f.
answer: 6

Write down the solution for this math problem: Solve -8*r + 4*r = 20 for r.
answer: -5

Write down the solution for this math problem: Solve -324*v = -644*v + 310*v + 450 for v.
answer: 45

Write down the solution for this math problem: Solve -1555*f + 1568*f = -117 for f.
answer:
-9