Write down the solution for this math problem: Solve 540*a + 426 + 983 + 1291 = 0 for a.
answer: -5

Write down the solution for this math problem: Solve 1661 = 26*f + 1687 for f.
answer: -1

Write down the solution for this math problem: Solve 1560 + 5013 = -1018*d - 5079 - 1582 for d.
answer: -13

Write down the solution for this math problem: Solve 89*l = -1534 + 6676 + 5568 - 2611 for l.
answer:
91