(Probably should look at the photo instead of the writing btw) A firm making fertiliser produces a new fertiliser QuickGrow. Each 50kg bag of QuickGrow contains x kg of compound X and (50-x)kg of compound Y. Each kilogram of X contains 150g of a particular element and each kilogram of Y contains 80g of this element. The company wants each 50kg of QuickGrow to contain 6.24kg of this element

(Look at the picture for a and b)