question: Teacher asked me this: Solve 11*s + 231 - 253 = 0 for s.
++++++++++
answer: 2

question: Teacher asked me this: Solve -106*b + 6658 = 85*b - 9719 - 6543 for b.
++++++++++
answer: 120

question: Teacher asked me this: Solve -61*v + 224*v + 652 = 0 for v.
++++++++++
answer: -4

question: Teacher asked me this: Solve 48*b - 51*b - 15 = 0 for b.
++++++++++
answer:
-5