Write down the solution for this math problem: Solve 3*n + 7*n - 50 = 0 for n.
answer: 5

Write down the solution for this math problem: Solve -38*c - 6*c + 34 = 342 for c.
answer: -7

Write down the solution for this math problem: Solve -53 = 4*c + 14*c + 127 for c.
answer: -10

Write down the solution for this math problem: Solve -2*v - v = -20*v + 11*v - 42 for v.
answer:
-7