Hello, dumluck!

Q: 5 litres of water is added to a certain quantity of pure milk costing $3 per litre.

If, by selling the mixture at the same price as before, a profit of 20% is made,

what is the amount of pure milk in the mixture?

A: Ok so we have 3x as our cost which should be equal to 1.2(3x)

. . (or 120% of 3x given profit).

I would imagine the expression therefore to be 3x + 5 = 1.2(3x). . No

We have litres of milk.

We add litres of water.

We have: liters of mixture, which will sold at $3 per litre.

Its value is: . dollars.