question: Teacher asked me this: Solve 612*x + 1380 = 750*x for x.
++++++++++
answer: 10

question: Teacher asked me this: Solve 289*f - 405 = 334*f for f.
++++++++++
answer: -9

question: Teacher asked me this: Solve 8*d - 110 = -12*d + 30*d for d.
++++++++++
answer: -11

question: Teacher asked me this: Solve 0 = -4*d + 26 - 10 for d.
++++++++++
answer:
4