Write down the solution for this math problem: Solve 0 = 757*v - 646*v + 222 for v.
answer: -2

Write down the solution for this math problem: Solve 157*b + 130*b - 90*b = 197 for b.
answer: 1

Write down the solution for this math problem: Solve 0 = -69*u + 63*u + 36 for u.
answer: 6

Write down the solution for this math problem: Solve -7*o = -6*o + 3 for o.
answer:
-3