question: Teacher asked me this: Solve -39*z + 49*z = 40 for z.
++++++++++
answer: 4
Solve 215 - 217 = d for d.
Solve this plz.

A: -2
QUESTION: Math problem: Solve 102*x - 393 = 117 for x.
ANS: 5
Q: What is the solution?
Solve -42 - 24 = -22*h for h.

A: 3
Write down the solution for this math problem: Solve -6052*r - 190531 - 265973 = 172904 for r.
answer: -104
Write down the solution for this math problem: Solve -38638*a + 38472*a + 709 = -1775 + 160 for a.
answer:
14