Q: Solve 13*b = 6*b + 21 for b.

A: 3

Q: Solve 188*h = 1896 - 7160 for h.

A: -28

Q: Solve 49*n - 30 = 39*n for n.

A: 3

Q: Solve -28*y = 8*y + 102*y + 138 for y.

A:
-1