posted by susan .
I am the middle of 3 numbers whose total is 31. The largest is 3 more than 5 times the smallest. What # am I?
1st number I put as x
2nd number I put as y as long as y> x
3rd number is 3+5x=z
so when I plug it in I get
Now is where I get lost. Because I have Y & Z but when I plug it all in I get 0 for X which doesn't come out correctly.?????
But, y>x, since it is the middle
So, we have
28-6x > x
28 > 7x
x < 4
So, we have several choices
But y is the middle, so only 3,10,18 works.