The solution contains 140 g of salt. What is the mass of the solution if the salt in it is 35%?

The solution contains 140 g of salt.

Let m be the mass of the solution.

Determine the mass of the solution if the salt in it is 35%.

Let’s compose an expression:

100% – m;

35% – 140 grams;

We multiply the values cross by cross and then we get:

35 * m = 100 * 140;

m = 100 * 140/35 = 100 * (70 + 70) / 35 = 100 * (70/35 + 70/35) = 100 * (2 + 2) = 100 * 4 = 400;

This means that the mass of the solution is 400 grams.