Kacie bought x, number of pencils. She paid $0.91, including tax, per pencil. She gave the cashier $10 and received $6.36 back in change. How many pencils did she purchase?

She purchased 4 pencils

Step-by-step explanation:

Here, we are to calculate the number of pencils bought given the information in the question.

The amount per pencil is $0.91. The total amount of this since she bought x number of pencils is $0.91 * x = $0.91x

Now, after paying $10, she was given $6.36 as change

what this means is that what the pencils cost is 10-6.36 = $3.64

Now we equate the cost in terms of x to this;

0.91x = 3.64

x = 3.64/0.91

x = 4 pencils

4 pencils

Step-by-step explanation:

From the question, Kacie bought x, number of pencils. She paid $0.91, including tax, for a pencil and gave the cashier $10 and received $6.36 back in change.

Let the number of pencils bought be x.

Since she paid $0.91 per pencil, and gave the cashier $10 and collected $6.36 as change, this will be:

10 - 0.91x = 6.36

Collect like terms

0.91x = 10 - 6.36

0.91x = 3.64

x = 3.64/0.91

x = 4

She bought 4 pencils