Q: Solve -100*d + 98*d = 0 for d.

A: 0

Q: Solve -20*i - 51 = 31*i for i.

A: -1

Q: Solve -4*j + 27 = 23*j for j.

A: 1

Q: Solve 785*h + 823*h + 916*h + 76114 = 521*h for h.

A:
-38