question: Teacher asked me this: Solve -3*a + 49 = 64 for a.
++++++++++
answer: -5

question: Teacher asked me this: Solve -d - 6 = -7*d for d.
++++++++++
answer: 1

question: Teacher asked me this: Solve -632*t = -80*t + 498*t + 73635 + 9315 for t.
++++++++++
answer: -79

question: Teacher asked me this: Solve 81*b - 19943 = 189*b + 431*b for b.
++++++++++
answer:
-37