Q: Solve -45 = 10*r - 115 for r.

A: 7

Q: Solve -1194*i + 564 = -1241*i for i.

A: -12

Q: Solve -8*d - 16*d - 980 = -44*d for d.

A: 49

Q: Solve -241*w + 343912 - 28922 = -5087*w for w.

A:
-65