# Ben bought 7 notebooks for .50. some of the notebooks were .50 each and the others were .25 each. if x represents the number of least expensive notebooks, which equation can be used to find the number of least expensive notebooks purchased?

## Answers

There are two types of notebooks which Ben bought. One type cost $3.50 each and the other type cost$4.25 each. The number of least expensive notebooks is x. This means Ben bought x notebooks of $3.50 each. Since he bought 7 notebooks in total, the number of other notebooks will be (7 - x) The price of 7 notebooks was$34.50. So we can set up the equation as follows: 3.50x + 4.25(7 - x) = 34.50 Using this equation we can find the value of x i.e. the number of least expensive notebooks purchased.

Given:Total Price of 7  notebooks ben bought = $34.50 If X= number of least expensive notebook at$3.50, then 7-X=number of the other notebook at \$4.25The equation to find X will be:X(3.50)+(7-X)4.25=34.50

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