# Over a 6 month period, a bakery sold an average of 29 pies per day. The number of apple pies they sold was four less than twice the number of blueberry pies they sold. How many blueberry pies did the bakery average selling per day during that period?

Jun 13, 2016

Let $x$ be the average number of apple pies sold and $y$ be the average number of blueberry pies sold per day at the bakery.

$x + y = 29$

$x = 2 y - 4$

$2 y - 4 + y = 29$

$3 y = 33$

$y = 11$

The bakery sold an average of $11$ blueberry pies per day.

Hopefully this helps!

Jun 13, 2016

11 blueberry pies.

#### Explanation:

It is also possible to work this out using only one variable, as long as we write an expression for each type of pie.

There were fewer blueberry pies sold than apple pies, so:
Let the Number of blueberry pies be $x$
The number of apple pies is $2 x - 4 \text{ (4 less than double x)}$

There are 29 pies sold every day.
Blueberry pies + apple pies = 29

$x + 2 x - 4 = 29$
$3 x = 33$
$x = 11$

$x$ is the number of blueberry pies.