Write down the solution for this math problem: Solve 0 = -61*a + 102 + 203 for a.
answer: 5

Write down the solution for this math problem: Solve -5*d - 32 = -2 for d.
answer: -6

Write down the solution for this math problem: Solve 158466 = -382*b - 2019*b for b.
answer: -66

Write down the solution for this math problem: Solve -104*k + 455*k - 6331 = -3994 + 12405 for k.
answer:
42