Q: Solve -7*y - 7 = -0 for y.

A: -1

Q: Solve 504 = 84*z + 2677 + 1892 - 705 for z.

A: -40

Q: Solve 7*c = 5 + 9 for c.

A: 2

Q: Solve -54*i = 43*i - 41*i - 840 for i.

A:
15