First, you want to get s by itself
To do this, add 15 to both sides
s=$15.92+15
s=$30.92
This would be the cost of the shirt, not the pants
To find how much the pants cost, you would have to add $5.30 to the cost of the shirt, since the pants cost $5.30 more than the shirt
s=$30.92+$5.30
s=$36.22
So the pants cost $36.22