What is 85 less than the product of 23 and an unknown number is 191 in an equation?

It says factor each expression completely 8y+48

Pyotr tchaikovsky sporting goods operates on a 45% overhead based on the selling price, which results in an overhead of $65.34 on the newest version of an air hockey game set. if the air hockey game set costs pyotr tchaikovsky sports $49.32, find the selling price, the markup, and the net profit.

A50% increase followed by 33 1/2% decrease