Q: Solve -y = 6*y + 21 for y.

A: -3

Q: Solve -3709 + 94248 = 2447*v for v.

A: 37

Q: Solve -158*z - 346 - 627 = -25 for z.

A: -6

Q: Solve 108*v - 210*v - 264*v + 41*v + 13000 = 0 for v.

A:
40