Salim sells fax machines that come in Standard and Enhanced models. The Standard model sells for $325 and the Enhanced model sells for $385. If Salim sold a total of 35 units and took in $12,575, how many of the Enhanced model did he sell?

The 20 units of enhanced should he sold.

Explanation:

For computing the units, we have to assume the things which is shown below:

we know that the sum of standard model and enhance model is 35 units

So, standard model be X

And, the enhance model be 35-X

So, the equation would be

Standard model + enhance model = $12,575

$325X + $385 * (35-X) = $12,575

$325X + $13,475 - $385X = $12,575

- 60X = $12,575 - $13,475

- 60X = - $900

So, X = 15 units

That means standard model is 15 units and the enhanced model is 20 units (35 units - 15 units)