#### Diamond-Leopard

##### New member

- Joined
- Jul 9, 2018

- Messages
- 2

**Need Eqn for shop: cost $X, sell at £Y; Y reduced by 15% & £3; should equal £Y**

So I know when you read this you will think that I am incredibly stupid and I apologize in advance for my ignorance but hope that you will humor my stupidity.

I need an algebraic equation to help my shop...

If I buy a product for a Price, Id like to call the price 'X'

and I sell the product for a higher Price, Id like to call the price 'Y'

Now my Y value needs to be reduced by 15% and also reduced by £3 so that will give me the X value..... however I already know the X value I need to know how to get from the x Value to the Y value ???

I hope that makes sence....

So something like y=x*1.5+2?

I know that is wrong but I hope someone could help me?