question: Teacher asked me this: Solve 189*j + 48*j = -3555 for j.
++++++++++
answer: -15

question: Teacher asked me this: Solve 443 = 25*r + 668 for r.
++++++++++
answer: -9

question: Teacher asked me this: Solve -7*c - 19*c = 0 for c.
++++++++++
answer: 0

question: Teacher asked me this: Solve 3*z - 43*z = 0 for z.
++++++++++
answer:
0