Write down the solution for this math problem: Solve 212*a + 37704261 = 37685605 for a.
answer: -88

Write down the solution for this math problem: Solve 4*b - 5 = -b for b.
answer: 1

Write down the solution for this math problem: Solve 7444*r - 2460*r - 2564*r - 2572*r = -7144 for r.
answer: 47

Write down the solution for this math problem: Solve 79*f - 35 = -72 - 42 for f.
answer:
-1