question: Teacher asked me this: Solve -10*q + 421 = 10*q + 221 for q.
++++++++++
answer: 10
Solve 13*x - x + 689 - 581 = 0 for x.
Solve this plz.

A: -9
QUESTION: Math problem: Solve 0 = -6*f - 5*f - 102 - 19 for f.
ANS: -11
Q: What is the solution?
Solve -14*d + 34 + 120 = 0 for d.

A: 11
Write down the solution for this math problem: Solve 2*n = 4*n - 4 for n.
answer: 2
Q: Solve:
Solve 98*u - 169 = -111*u + 196*u for u.

A:
13