question: Teacher asked me this: Solve -1215*f + 16440 = 735*f - 3060 for f.
++++++++++
answer: 10
Solve 31*n - 3*n + 13*n - 41 = 0 for n.
Solve this plz.

A: 1
QUESTION: Math problem: Solve -18*t - 20*t = -228 for t.
ANS: 6
Q: What is the solution?
Solve -450*d + 15120 + 14192 = -32182 - 2406 for d.

A: 142
Write down the solution for this math problem: Solve 0 = 18*o + 3914 - 3212 for o.
answer: -39
QUESTION: Math problem: Solve 116 = 2*r + 122 for r.
ANS:
-3