Problema Solution
1. A box of marbles weighs 12 pounds when it is ¾ full. It weighs 2.9 pounds when it is 1/6 full. What is the weight of the box?
Answer provided by our tutors
assume the weight of box is x;
the weight of 100% full marble is y;
then we get
x+3/4*y=12;
x+1/6*y=2.9
y=15.6
x=0.3
so the box weight 0.3 poud