question: Teacher asked me this: Solve -177*a + 8 = -173*a for a.
++++++++++
answer: 2

question: Teacher asked me this: Solve -5*w + 3*w - 2*w = 0 for w.
++++++++++
answer: 0

question: Teacher asked me this: Solve 195*w - 1675 = -310 for w.
++++++++++
answer: 7

question: Teacher asked me this: Solve -13*l + 17 = 4 for l.
++++++++++
answer:
1