question: Teacher asked me this: Solve 28 = 21*x - 0*x + 259 for x.
++++++++++
answer: -11

question: Teacher asked me this: Solve 475*s = 458*s - 102 for s.
++++++++++
answer: -6

question: Teacher asked me this: Solve -x + 8*x = -4*x - 8*x + 266 for x.
++++++++++
answer: 14

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