Write down the solution for this math problem: Solve 5*d = 9*d - 4 for d.
answer: 1

Write down the solution for this math problem: Solve 0 = 281*v - 21*v + 6892 - 652 for v.
answer: -24

Write down the solution for this math problem: Solve 97*f + 293 + 3490 = 0 for f.
answer: -39

Write down the solution for this math problem: Solve 643 - 195 = -14*y for y.
answer:
-32