question: Teacher asked me this: Solve -101*s + 3128 = 35*s for s.
++++++++++
answer: 23

question: Teacher asked me this: Solve 877*d = 664*d - 4686 for d.
++++++++++
answer: -22

question: Teacher asked me this: Solve -38*b = -237*b + 1191 + 3386 for b.
++++++++++
answer: 23

question: Teacher asked me this: Solve -21*x + 1652 = 40*x - 120*x for x.
++++++++++
answer:
-28