On frank's bus ride to work all available seats are filled and 6 passengers are standing in the aisles. if 10 passengers get off the bus and 8 others get on how many passengers are standing in the aisles assuming all available seats continue to be filled?

Originally 6 people are standing. 10 people get off the bus. The six people who are standing will take their seats and remaining 4 seats will be occupied by four out of the eight people who alight the bus. So now 4 people will be standing on the aisles.

So, there are 6 people standing at first. Then, 10 people get off. The 6 people standing will take 6 out of 10 of the empty seats because 10 people left. Now, there are four seats left. Out of the 8 people who get on, 4 of them will take a seat. So, there will be 4 people left. Those 4 people are now standing.
Hope this helped!

12+3b -1=-5-b -12-1+5=-b-3b -8=-4b