Can some please solve it has two type in answers

Steve wants to develop a way to find the total cost of any item including sales tax. the sales tax in his city is 6%. his friend jenna writes the expression x + 6x where x is the cost of the item. explain whether her expression is correct based on the situation.

What is the value of x in the following equation? -3x-2=2x+8

With finding limits of multi variable !