Write down the solution for this math problem: Solve -38*f - 578 - 160 = 98 for f.
answer: -22

Write down the solution for this math problem: Solve 661*v - 1306 = -1161*v - 2241*v + 6820 for v.
answer: 2

Write down the solution for this math problem: Solve 36*o + 57*o + 87*o - 1260 = 0 for o.
answer: 7

Write down the solution for this math problem: Solve 0 = 3420*h - 3426*h + 18 for h.
answer:
3