Q: Solve:
Solve 0 = 60*p + 639 + 789 + 12 for p.

A: -24

Q: Solve:
Solve 41*z = -78*z - 16*z - 2430 for z.

A: -18

Q: Solve:
Solve 987*j = -720*j + 2463*j - 34020 for j.

A:
45