Question 142808

Let x= Number of marbles in Derek's marble collection
Derek gave Kyle x/2 marbles
Kyle gave Janis (1/2)(x/2) or x/4 marbles

Now we are told in a roundabout way that Janis received 28 marbles, so:

x/4=28  multiply each side by 4

x=112------Number of marbles in Derek's marble collection


x/2=112/2=56------------------number of marbles that Derek gave Kyle

(1/2)*56=28-----Number of marbles that Kyle gave Janis and this checks.


Hope this helps---ptaylor