Q: Solve -578 + 49 = 49*d + 1618 + 254 for d.

A: -49

Q: Solve -18656 = -241*w + 143*w + 1171*w - 137759 for w.

A: 111

Q: Solve 350 + 2101 = 129*s for s.

A: 19

Q: Solve -15*n + 898 - 763 = 0 for n.

A:
9