help with solving word problems

Question

If I have a 70 inch tv and the sales taxs is 7%. Determine the television with the sales tax. I need to translate into an algebraic equation,solve, and check.

Answer 1

Percent problems can be handled with nothing more than two simple equations and some thought.

 

percent x whole = part x 100

 

percent change = (difference/original) x 100

 

The sales tax is simply 0.07 x list price of TV. The out-the-door price of the TV is list price of TV + sales tax.

 

Out-the-door price of TV = list price of TV + 0.07 x list price of TV

Answer 2

Let x be the price of the tv.

 

The total cost is x + 0.07x

 

You can factor out the x to get x(1 + 0.07) = 1.07x.

 

The total cost of a tv that costs $x is  $1.07x.