Q: Solve 0 = -7*w + 7 + 28 for w.

A: 5

Q: Solve 248*n - 2623 + 8138 + 1359 + 3294 = 0 for n.

A: -41

Q: Solve -5*r - 5*r - 1950 = 140*r for r.

A: -13

Q: Solve 144*p + 793 + 6326 - 508 = -4909 for p.

A:
-80