An iPhone costs £750 in London, €800 in Paris and $1,050 in New York. Using £1 = €1.14 and £1 = $1.39, state the lowest price of the iPhone in £.
Give your answer to 2 dp.

The iPhone is cheapest in Paris, where it costs £701.75.

Step-by-step explanation:

Divide each price by the conversion factor.

3(x + 2y = 9) = 3x + 6y = 27 < I multiplied this equation by 3 to get the y value to cancel with the y value of the next equation

2(-x - 3y = -14) = -2x - 6y = -28 , I multiplied this equation by 2 to get the y value to cancel with the y value of the previous equation

   3x + 6y = 27

+ 2x  - 6y = -28

5x             = 55
             x  = 55/5
             x = 11

Then plug the 11 into one of the equations to solve for y.

x + 2y = 9
(11) + 2y = 9
           2y = 9 - 11
           2y = -2
             y = -2/2
             y = -1

hope this helps :)