Q: Solve:
Solve 20*n + 20*n = -160 for n.

A: -4

Q: Solve:
Solve -580*d - 374936 + 88100 = 1752*d for d.

A: -123

Q: Solve:
Solve -28*o = -526 + 251 + 219 for o.

A:
2