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jenny has an 18in sub she cuts it so demi gets half of what she gets and drew gets 3/4 of what jenny gets. what is the length of each persons sandwich

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1 Answer

Hi Tammy;
 
x+x/2+(3/4)x=18
 
Let's multiply everything by 4.  We are selecting 4 because this number is easily divisible by either 2 or 4...
4(x+x/2+(3/4)x)=18(4)
4x+(4x)/2+(4)(3/4)x=18(4)
4x+2x+3x=72
9x=72
x=8 inches=Jenny's share
x/2=4 inches=Demi's share
(3/4)x=6 inches=Drew's share
 
8 + 4 + 6=18

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