Let x be number of black markers
4.5x + 2x3.25x + 3x1.98x = 284.24
16.94x = 284.24
x = 16.78 = 17
The person bought 17 black pens, 34 red and 51 green
The product in simplest form is (x - 4)
<em><u>Solution:</u></em>
<em><u>Given expression is:</u></em>

We have to find the product in simplest form
In the given expression,
2x + 8 = 2(x+ 4)
We know that,

Therefore,

Substitute these in given expression

Cancel the common factors,

Thus the product in simplest form is (x - 4)
Chin is correct because 5 x $.65 is $3.25., and he multiplied by US/GB
Nadene is incorrect because she took GB/US x 5