OpenStudy (anonymous):
A company sells cardboard that is 9 1/4mm thick. Write an equation to solve for the number of sheets of cardboard, c, in a pile that is 129 1/2mm thick. What must be done to both sides to solve the equation?
OpenStudy (sburchette):
We can let c equal the number of sheets of cardboard in the pile. The total thickness of a pile of sheets will be the thickness of one sheet multiplied by the numbers sheets you have. So the general equation for this problem is\[T=9.25c\] Where T is the total thickness and c is the numbers sheets you have. The problem has told us that the total thickness is 129.5. So now our equation is \[129.5=9.25c\] To solve for c, simply divide each side of the equation by 9.25 which will give you \[c=14\] So there are 14 sheets of cardboard in the pile.
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