question: Teacher asked me this: Solve 861430*a + 84 = 861418*a for a.
++++++++++
answer: -7

question: Teacher asked me this: Solve -71*r + 80*r = 63 for r.
++++++++++
answer: 7

question: Teacher asked me this: Solve -7*o - 35*o = -24*o for o.
++++++++++
answer: 0

question: Teacher asked me this: Solve 235851*m - 235913*m = -620 for m.
++++++++++
answer:
10