Write down the solution for this math problem: Solve -108*x - 210*x = -113*x - 3075 for x.
answer: 15

Write down the solution for this math problem: Solve 1198 + 23750 = -145*w + 838*w for w.
answer: 36

Write down the solution for this math problem: Solve -6845*f = -6881*f + 612 for f.
answer: 17

Write down the solution for this math problem: Solve 4 = -10*k - 6 for k.
answer:
-1