Problem: Math Problem
Solve 21*v + 63*v = 168 for v.

A: 2

Problem: Math Problem
Solve 30*n - 97 = -39*n - 166 for n.

A: -1

Problem: Math Problem
Solve -1633*y + 615*y - 36887 - 4851 = 0 for y.

A:
-41