question: Teacher asked me this: Solve 0 = -9*d + 20*d for d.
++++++++++
answer: 0
Solve -515*b + 810545 - 754925 = 0 for b.
Solve this plz.

A: 108
QUESTION: Math problem: Solve 8*z = 7 - 79 for z.
ANS: -9
Q: What is the solution?
Solve -11*z + 20*z = 0 for z.

A: 0
Write down the solution for this math problem: Solve 0 = 1779*w - 5428*w + 1307*w + 1519*w - 106990 for w.
answer: -130
question: Teacher asked me this: Solve 1708*r - 68456 = 116*r for r.
++++++++++
answer:
43