question: Teacher asked me this: Solve -45*b = -40*b + 10 for b.
++++++++++
answer: -2

question: Teacher asked me this: Solve 400 = 40*u - 0*u for u.
++++++++++
answer: 10

question: Teacher asked me this: Solve 12 = 5*p + 2 for p.
++++++++++
answer: 2

question: Teacher asked me this: Solve -g = 3*g - 20 for g.
++++++++++
answer:
5