The answer is 5 buses.
128/30= 4.2....
Round to 5 for the extra children not on the fourth bus.
8 hundred thousands 0 ten thousands and 0 thousands


for example, let's look at the first set
y+3x =5 or y = -3x+ 5
and y = -3x + 2
y = m + b
the slopes are equal, the y-intercepts differ
that means, they're just parallel lines, no solution
Muffins in each box are: 868/31=28
Hope it helpful!!!! ^^