10% salt solution contains 180 g of water. What is the mass of this solution?

It is known from the condition that a 10% salt solution contains 180 grams of water. In order to find what mass of this solution we will compose and solve the proportion.

Let’s use the variable x to denote the weight of the solution and take it as 100%.

Let’s calculate as a percentage how much water is contained in a 10% salt solution:

100 – 10 = 90%.

Let’s compose and solve the proportion:

x gram – 100%;

180 grams – 90%.

x / 180 = 100/90;

We need to find the unknown extreme term of the proportion:

x = (180 * 100) / 90 = 18000/90 = 200 grams mass of the solution.