question: Teacher asked me this: Solve 714 = -317*r + 359*r for r.
++++++++++
answer: 17

question: Teacher asked me this: Solve -35*v + 26*v - 9 = 0 for v.
++++++++++
answer: -1

question: Teacher asked me this: Solve 51 = -30*d - 279 for d.
++++++++++
answer: -11

question: Teacher asked me this: Solve 0 = 39*a + 156 for a.
++++++++++
answer:
-4