Question

PLEASE DO THIS..............

Answer 1

Let x and y be the price of the fridge and the freezer before the sale, respectively.

Since the sale offers 15% off everything, Kristianne actually paid the remaining 85%

`(85)/(100)(x+y) = (17)/(20)(x+y) = 357`

We are given that the freezer costed 250 before the sale, i.e. y=250. Plug this value in the equation to get

`(17)/(20)(x+250) = 357`

We can manipulate this expression to get

`(17)/(20)(x+250) = 357 \iff x+250=357\cdot(20)/(17)\iff x+250=420\iff x=170`