Write down the solution for this math problem: Solve 0 = -212*f + 132*f + 2000 for f.
answer: 25

Write down the solution for this math problem: Solve 0 = -6*g - 675 + 687 for g.
answer: 2

Write down the solution for this math problem: Solve 58*t - 238 = -18 + 302 for t.
answer: 9

Write down the solution for this math problem: Solve -15406 = 1030*u + 6224 for u.
answer:
-21