Q: Solve:
Solve 0 = -140*t + 93*t + 68*t + 84 for t.

A: -4

Q: Solve:
Solve 189 = 90*d - 63*d for d.

A: 7

Q: Solve:
Solve -1072*m - 16875 = -447*m for m.

A:
-27