Translate seven minus three times a number into an algebraic expression

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.

2y= 3 2 x−2 y = − 1 3 x + 1 y=− 3 1 x+1

X2 + y 2 = 36 x + y = 6 solve the system of equations.