Q: Solve:
Solve -15*d - 102 = d + 2*d + 24 for d.

A: -7

Q: Solve:
Solve 155*i - 379 + 661 = 12*i - 576 for i.

A: -6

Q: Solve:
Solve 28*d - 58 = -d for d.

A:
2