Write down the solution for this math problem: Solve -839789*d = -839645*d - 864 for d.
answer: 6

Write down the solution for this math problem: Solve 22*r - 28*r - 24 = 0 for r.
answer: -4

Write down the solution for this math problem: Solve 3*v - 2343 = 61*v - 3967 for v.
answer: 28

Write down the solution for this math problem: Solve -420 = -16*t - 484 for t.
answer:
-4