i need help with this riddle!!?

Question

Mr. black's class was playing windows. the object of the game was to use the digits 1 to 9 once in each "window" to make as many true equations as possible. mr. black told the class he would let them go to lunch a minute early for each correct solution they could find. how many minutes was it possible for the class to earn? what are the possible solutions?

Answer 1

9-6=3+2=5-4=1+7=8

This works, but I'm not exactly sure if this is what the question is asking. Does the question mean their are 9 windows?

The equasion I came up with has 9-6=3, 3+2=5, 5-4=1, 1+7=8 four correct equasion, but you can also do it backwards. 8-7=1, 1+4=5, 5-2=3, 3=6=9, so that would mean the kids got to luch eight minutes early... Hope this helps. Oh, and if your still confused email or im me.

Answer 2

8 minutes