Q: Solve 120*r - 2940 = -4740 for r.

A: -15

Q: Solve -5536 + 81201 = -2045*a for a.

A: -37

Q: Solve -1942*w = -664*w + 1846*w + 204403 - 66947 for w.

A: -44

Q: Solve 59*b = b - 7*b + 780 for b.

A:
12