question: Teacher asked me this: Solve -59*r + 258 = -50 + 72 for r.
++++++++++
answer: 4

question: Teacher asked me this: Solve 87 = -5*o + 92 for o.
++++++++++
answer: 1

question: Teacher asked me this: Solve 303*b + 2214 = 585*b - 323*b for b.
++++++++++
answer: -54

question: Teacher asked me this: Solve 4894 = 710*f - 25636 for f.
++++++++++
answer:
43