question: Teacher asked me this: Solve -211*r + 3139 + 4230 = -4877 - 5900 for r.
++++++++++
answer: 86

question: Teacher asked me this: Solve 373*y - 9*y = 61*y - 324 - 3009 for y.
++++++++++
answer: -11

question: Teacher asked me this: Solve 19*b - 37*b + 90 = -28*b for b.
++++++++++
answer: -9

question: Teacher asked me this: Solve -10*r + 3257 = 3447 for r.
++++++++++
answer:
-19