Each classroom donated around 320 cans(or more) of food.
320x28=8,960.
0.87 is 87/100 as a fraction.
Since 87/100 is already simplified, the answer is 87/100.
Hope this helps!
Lemme think real quick...
5-4*9= 9
just use the properties
20; make both equations equal so whatever you plug in for x will be the same
2(4x+10)=8x+k
8x+20=8x+k
k=20