Write down the solution for this math problem: Solve 5*b + 900 = 870 for b.
answer: -6

Write down the solution for this math problem: Solve 1629*p + 4363*p - 170856 = 1924*p for p.
answer: 42

Write down the solution for this math problem: Solve -195 = -18*u + 111 for u.
answer: 17

Write down the solution for this math problem: Solve 18*f + 14 = 11*f for f.
answer:
-2