Write down the solution for this math problem: Solve -319*u - 3186*u - 1300*u + 495*u = 930*u for u.
answer: 0

Write down the solution for this math problem: Solve -8 + 8 = 31*b for b.
answer: 0

Write down the solution for this math problem: Solve 63*m + 1772 = -75*m + 10604 for m.
answer: 64

Write down the solution for this math problem: Solve 270*a - 3509 = 1207*a + 19916 for a.
answer:
-25